Full Service CG Unlocking Tips
Hi. This is not a step-by-step guide, but more of a collection of tips on unlocking specific CGs in the game Full Service by Herculion. On my journey to unlocking all CGs, I found it very difficult to find guides for all of them in one place, and even when I found some guides, some of them didn't work. So I decided to compile this based on what worked on my multiple playthroughs. Hope it helps!
Note that this game has so many different routes, so you might unlock CGs through different steps than how I did. These are just the ones that worked for me when I unlocked all the CGs.
If you have other tips, please feel free to share them. Others might find them helpful.
Also, I compiled this late at night, and I'm kinda sleepy, so if there are errors, I apologize in advance. Also, please let me know so that I can correct them. Thanks!
PAGE 1
1-8
These CGs will automatically be unlocked on the first day.
9-12
These are Sota's first massage CGs.
PAGE 2
1-4
These are Remi's first massage CGs.
5-8
These are Kovit's first massage CGs.
9-12
These are Rald's first massage CGs.
PAGE 3
1
Automatically unlocks.
2-4
Sota's first full service massage CGs.
5-7
Remi's first full service massage CGs.
8-10
Kovit's first full service massage CGs.
11-12
Rald's first full service massage CGs.
PAGE 4
1
Part of Rald's first full service massage CGs.
2-5
Automatically unlocks.
6-8
Sota's hot springs CGs.
9-11
Remi's hot springs CGs.
12
Part of Kovit's hot springs CGs.
PAGE 5
1-2
Part of Kovit's hot springs CGs.
3-5
Rald's hot springs CGs.
6-8
Lenga's hot springs CGs.
9
Automatically unlocks.
10-12
Sota's festival CGs.
*Note for the festival CGs*
I was told that you need to have gone on at least 2 dates with the character to unlock the CGs, but in my playthrough, I had to go on 3 dates. I'm not sure if it had to do with the number of dates itself or how high the affection is (heart colour from giving gifts and interacting with the character). What worked for me was going on 3 dates, so that's what I would suggest doing.
PAGE 6
1-3
Remi's festival CGs.
*Note for the festival CGs*
I was told that you need to have gone on at least 2 dates with the character to unlock the CGs, but in my playthrough, I had to go on 3 dates. I'm not sure if it had to do with the number of dates itself or how high the affection is (heart colour from giving gifts and interacting with the character). What worked for me was going on 3 dates, so that's what I would suggest doing.
4-6
Kovit's festival CGs.
*Note for the festival CGs*
I was told that you need to have gone on at least 2 dates with the character to unlock the CGs, but in my playthrough, I had to go on 3 dates. I'm not sure if it had to do with the number of dates itself or how high the affection is (heart colour from giving gifts and interacting with the character). What worked for me was going on 3 dates, so that's what I would suggest doing.
7-9
Rald's festival CGs.
*Note for the festival CGs*
I was told that you need to have gone on at least 2 dates with the character to unlock the CGs, but in my playthrough, I had to go on 3 dates. I'm not sure if it had to do with the number of dates itself or how high the affection is (heart colour from giving gifts and interacting with the character). What worked for me was going on 3 dates, so that's what I would suggest doing.
10-12
Automatically unlocks. Part of first full service CGs with Oki & Okan.
PAGE 7
1
Automatically unlocks. Part of first full service CGs with Oki & Okan.
2-5
Sota's theme day (costume day) CGs.
6-9
Remi's theme day (costume day) CGs.
10-12
Part of Kovit's theme day (costume day) CGs.
PAGE 8
1
Part of Kovit's theme day (costume day) CGs.
2-5
Rald's theme day (costume day) CGs.
6-8
Lenga's theme day (costume day) CGs.
9-12
Part of Oki & Okan's 's theme day (costume day) CGs.
PAGE 9
1
Part of Oki & Okan's theme day (costume day) CGs.
2
Automatically unlocks.
3-5
Sota's beach day CGs.
*Note for the beach day CGs*
Again, like the festival CGs, I'm not sure if you need to have gone on 3 dates or if you only need to have red hearts to unlock the beach day CGs, but what worked for me was having gone on 3 or 4 dates and having their hearts at red. For the special Oki & Okan beach day CGs, what worked for me was having a high relationship with them (red hearts and a few dates). You first interact with them on Day 29, so start giving them gifts and going on dates with them from then.
6-8
Remi's beach day CGs.
*Note for the beach day CGs*
Again, like the festival CGs, I'm not sure if you need to have gone on 3 dates or if you only need to have red hearts to unlock the beach day CGs, but what worked for me was having gone on 3 or 4 dates and having their hearts at red. For the special Oki & Okan beach day CGs, what worked for me was having a high relationship with them (red hearts and a few dates). You first interact with them on Day 29, so start giving them gifts and going on dates with them from then.
9-11
Kovit's beach day CGs.
*Note for the beach day CGs*
Again, like the festival CGs, I'm not sure if you need to have gone on 3 dates or if you only need to have red hearts to unlock the beach day CGs, but what worked for me was having gone on 3 or 4 dates and having their hearts at red. For the special Oki & Okan beach day CGs, what worked for me was having a high relationship with them (red hearts and a few dates). You first interact with them on Day 29, so start giving them gifts and going on dates with them from then.
12
Part of Rald's beach day CGs.
*Note for the beach day CGs*
Again, like the festival CGs, I'm not sure if you need to have gone on 3 dates or if you only need to have red hearts to unlock the beach day CGs, but what worked for me was having gone on 3 or 4 dates and having their hearts at red. For the special Oki & Okan beach day CGs, what worked for me was having a high relationship with them (red hearts and a few dates). You first interact with them on Day 29, so start giving them gifts and going on dates with them from then.
PAGE 10
1-2
Part of Rald's beach day CGs.
*Note for the beach day CGs*
Again, like the festival CGs, I'm not sure if you need to have gone on 3 dates or if you only need to have red hearts to unlock the beach day CGs, but what worked for me was having gone on 3 or 4 dates and having their hearts at red. For the special Oki & Okan beach day CGs, what worked for me was having a high relationship with them (red hearts and a few dates). You first interact with them on Day 29, so start giving them gifts and going on dates with them from then.
3-5
Lenga's beach day CGs.
*Note for the beach day CGs*
Again, like the festival CGs, I'm not sure if you need to have gone on 3 dates or if you only need to have red hearts to unlock the beach day CGs, but what worked for me was having gone on 3 or 4 dates and having their hearts at red. For the special Oki & Okan beach day CGs, what worked for me was having a high relationship with them (red hearts and a few dates). You first interact with them on Day 29, so start giving them gifts and going on dates with them from then.
6-8
Okan's beach day CGs.
*Note for the beach day CGs*
Again, like the festival CGs, I'm not sure if you need to have gone on 3 dates or if you only need to have red hearts to unlock the beach day CGs, but what worked for me was having gone on 3 or 4 dates and having their hearts at red. For the special Oki & Okan beach day CGs, what worked for me was having a high relationship with them (red hearts and a few dates). You first interact with them on Day 29, so start giving them gifts and going on dates with them from then.
9-11
Oki's beach day CGs.
*Note for the beach day CGs*
Again, like the festival CGs, I'm not sure if you need to have gone on 3 dates or if you only need to have red hearts to unlock the beach day CGs, but what worked for me was having gone on 3 or 4 dates and having their hearts at red. For the special Oki & Okan beach day CGs, what worked for me was having a high relationship with them (red hearts and a few dates). You first interact with them on Day 29, so start giving them gifts and going on dates with them from then.
12
Part of Oki & Okan's beach day CGs.
*Note for the beach day CGs*
Again, like the festival CGs, I'm not sure if you need to have gone on 3 dates or if you only need to have red hearts to unlock the beach day CGs, but what worked for me was having gone on 3 or 4 dates and having their hearts at red. For the special Oki & Okan beach day CGs, what worked for me was having a high relationship with them (red hearts and a few dates). You first interact with them on Day 29, so start giving them gifts and going on dates with them from then.
PAGE 11
1
Part of Oki & Okan's beach day CGs.
*Note for the beach day CGs*
Again, like the festival CGs, I'm not sure if you need to have gone on 3 dates or if you only need to have red hearts to unlock the beach day CGs, but what worked for me was having gone on 3 or 4 dates and having their hearts at red. For the special Oki & Okan beach day CGs, what worked for me was having a high relationship with them (red hearts and a few dates). You first interact with them on Day 29, so start giving them gifts and going on dates with them from then.
2-3
Sota's Party at Rald's CGs.
*Note for Party at Rald's CGs*
You need to invite the character before the party. Like the beach event, make sure you have a high relationship with the character you're inviting. In my playthrough, I've gone on several dates and my heart indicator is red.
4-5
Remi's Party at Rald's CGs.
*Note for Party at Rald's CGs*
You need to invite the character before the party. Like the beach event, make sure you have a high relationship with the character you're inviting. In my playthrough, I've gone on several dates and my heart indicator is red.
6-7
Kovit's Party at Rald's CGs.
*Note for Party at Rald's CGs*
You need to invite the character before the party. Like the beach event, make sure you have a high relationship with the character you're inviting. In my playthrough, I've gone on several dates and my heart indicator is red.
8-9
Rald's Party at Rald's CGs.
*Note for Party at Rald's CGs*
You need to invite the character before the party. Like the beach event, make sure you have a high relationship with the character you're inviting. In my playthrough, I've gone on several dates and my heart indicator is red.
10-11
Lenga's Party at Rald's CGs.
*Note for Party at Rald's CGs*
You need to invite the character before the party. Like the beach event, make sure you have a high relationship with the character you're inviting. In my playthrough, I've gone on several dates and my heart indicator is red.
12
Part of Okan's Party at Rald's CGs.
*Note for Party at Rald's CGs*
You need to invite the character before the party. Like the beach event, make sure you have a high relationship with the character you're inviting. In my playthrough, I've gone on several dates and my heart indicator is red.
PAGE 12
1
Part of Okan's Party at Rald's CGs.
*Note for Party at Rald's CGs*
You need to invite the character before the party. Like the beach event, make sure you have a high relationship with the character you're inviting. In my playthrough, I've gone on several dates and my heart indicator is red.
2-3
Oki's Party at Rald's CGs.
*Note for Party at Rald's CGs*
You need to invite the character before the party. Like the beach event, make sure you have a high relationship with the character you're inviting. In my playthrough, I've gone on several dates and my heart indicator is red.
4-5
Automatically unlocks.
6-8
Sota's Day 57 full service CGs.
9-11
Remi's Day 57 full service CGs.
12
Part of Kovit's Day 57 full service CGs.
PAGE 13
1-2
Part of Kovit's Day 57 full service CGs.
3-5
Rald's Day 57 full service CGs.
6-7
Lenga's Day 57 full service CGs.
8-9
Oki & Okan's Day 57 full service CGs.
10-11
Automatically unlocks.
12
Unlocks if you chose "No don't get distracted" on Day 59 when Hisami is presented with the choice.
PAGE 14
1
Unlocks if you chose "No don't get distracted" on Day 59 when Hisami is presented with the choice, and you have a high enough relationship with Oki & Okan. Note, I added having a high relationship with Oki & Okan (in my playthrough, red hearts and multiple dates) because they will stop Hisami from taking you.
2-4
Hisami's "bad ending" CGs. I had a hard time getting these CGs to appear even on multiple playthroughs, but I finally managed to get these by doing a very specific set of steps:
Do a complete playthrough of the game first. You won't be able to unlock these CGs on your first playthrough.
Don't go on any dates or give gifts to other characters.
Refuse full service sex scenes. Automatic, unskippable sex scenes don't count since the game automatically plays those out (an example would be the first time you have sex with Oki & Okan on Day 29).
Don't invite anyone to Rald's party.
Make sure that you don't have a high relationship with Oki & Okan, otherwise, they'll save you from Hisami, and you won't unlock these CGs.
On Day 57, choose the twins to give you a massage. Ask them about Master on the first choice. Then tell them you're worried on the second choice.
On Day 59, choose "don't get distracted" when Hisami is prompted with the choice.
Just keep sleeping until Day 64, and these CGs will unlock then.
5
Hisami's "perfect ending" CG. To get this, the steps are pretty similar to the previous 3 CGs with just a few differences. Here are the steps that worked for me:
Do a complete playthrough of the game first. You won't be able to unlock these CGs on your first playthrough.
Don't go on any dates or give gifts to other characters.
Refuse full service sex scenes. Automatic, unskippable sex scenes don't count since the game automatically plays those out (an example would be the first time you have sex with Oki & Okan on Day 29).
Don't invite anyone to Rald's party.
On Day 57, choose the twins to give you a massage. Ask them about Master on the first choice. Then tell them you're worried on the second choice.
On Day 59, choose "have I been wrong" when Hisami is prompted with the choice and it will automatically unlock the CG.
6
Sota's "bad ending" CG. In my playthrough, I got this by going through the whole game without going on the third date with any characters (max 2 dates only) except for Oki & Okan. You need to go on all 5 dates (or maybe just have red hearts) for both Oki & Okan to stop Hisami from taking you. Then on the last day, you can talk to the character and unlock their "bad ending". Tip: save when you get on the last day and just reload and choose another character to unlock all "bad ending" CGs.
7-9
Sota's "good ending" CGs. To get this, go on at least 3 dates but not the 5th date (sex date). Also make sure that you have a high enough relationship with Oki & Okan (in my playthrough, I've gone to all 5 dates and my heart indicator is red with both of them) so that they'll save you from Hisami. Then on the last day, you can talk to the character and unlock their "good ending". Tip: save when you get on the last day and just reload and choose another character to unlock all "good ending" CGs.
10
Remi's "bad ending" CG. In my playthrough, I got this by going through the whole game without going on the third date with any characters (max 2 dates only) except for Oki & Okan. You need to go on all 5 dates (or maybe just have red hearts) for both Oki & Okan to stop Hisami from taking you. Then on the last day, you can talk to the character and unlock their "bad ending". Tip: save when you get on the last day and just reload and choose another character to unlock all "bad ending" CGs.
11-12
Part of Remi's "good ending" CGs. To get this, go on at least 3 dates but not the 5th date (sex date). Also make sure that you have a high enough relationship with Oki & Okan (in my playthrough, I've gone to all 5 dates and my heart indicator is red with both of them) so that they'll save you from Hisami. Then on the last day, you can talk to the character and unlock their "good ending". Tip: save when you get on the last day and just reload and choose another character to unlock all "good ending" CGs.
PAGE 15
1
Part of Remi's "good ending" CGs. To get this, go on at least 3 dates but not the 5th date (sex date). Also make sure that you have a high enough relationship with Oki & Okan (in my playthrough, I've gone to all 5 dates and my heart indicator is red with both of them) so that they'll save you from Hisami. Then on the last day, you can talk to the character and unlock their "good ending". Tip: save when you get on the last day and just reload and choose another character to unlock all "good ending" CGs.
2
Kovit's "bad ending" CG. In my playthrough, I got this by going through the whole game without going on the third date with any characters (max 2 dates only) except for Oki & Okan. You need to go on all 5 dates (or maybe just have red hearts) for both Oki & Okan to stop Hisami from taking you. Then on the last day, you can talk to the character and unlock their "bad ending". Tip: save when you get on the last day and just reload and choose another character to unlock all "bad ending" CGs.
3-5
Kovit's "good ending" CGs. To get this, go on at least 3 dates but not the 5th date (sex date). Also make sure that you have a high enough relationship with Oki & Okan (in my playthrough, I've gone to all 5 dates and my heart indicator is red with both of them) so that they'll save you from Hisami. Then on the last day, you can talk to the character and unlock their "good ending". Tip: save when you get on the last day and just reload and choose another character to unlock all "good ending" CGs.
6
Rald's "bad ending" CG. In my playthrough, I got this by going through the whole game without going on the third date with any characters (max 2 dates only) except for Oki & Okan. You need to go on all 5 dates (or maybe just have red hearts) for both Oki & Okan to stop Hisami from taking you. Then on the last day, you can talk to the character and unlock their "bad ending". Tip: save when you get on the last day and just reload and choose another character to unlock all "bad ending" CGs.
7-9
Rald's "good ending" CGs. To get this, go on at least 3 dates but not the 5th date (sex date). Also make sure that you have a high enough relationship with Oki & Okan (in my playthrough, I've gone to all 5 dates and my heart indicator is red with both of them) so that they'll save you from Hisami. Then on the last day, you can talk to the character and unlock their "good ending". Tip: save when you get on the last day and just reload and choose another character to unlock all "good ending" CGs.
10
Lenga's "bad ending" CG. In my playthrough, I got this by going through the whole game without going on the third date with any characters (max 2 dates only) except for Oki & Okan. You need to go on all 5 dates (or maybe just have red hearts) for both Oki & Okan to stop Hisami from taking you. Then on the last day, you can talk to the character and unlock their "bad ending". Tip: save when you get on the last day and just reload and choose another character to unlock all "bad ending" CGs.
11-12
Part of Lenga's "good ending" CGs. To get this, go on at least 3 dates but not the 5th date (sex date). Also make sure that you have a high enough relationship with Oki & Okan (in my playthrough, I've gone to all 5 dates and my heart indicator is red with both of them) so that they'll save you from Hisami. Then on the last day, you can talk to the character and unlock their "good ending". Tip: save when you get on the last day and just reload and choose another character to unlock all "good ending" CGs.
PAGE 16
1
Part of Lenga's "good ending" CGs. To get this, go on at least 3 dates but not the 5th date (sex date). Also make sure that you have a high enough relationship with Oki & Okan (in my playthrough, I've gone to all 5 dates and my heart indicator is red with both of them) so that they'll save you from Hisami. Then on the last day, you can talk to the character and unlock their "good ending". Tip: save when you get on the last day and just reload and choose another character to unlock all "good ending" CGs.
2-4
Okan's "good ending" CG. I got these CGs because I went on 5 dates with Okan and his heart meter is red. Based on my playthrough, you need these to stop Hisami from taking you and unlocking this and the "good ending" CGs.
5-7
Oki's "good ending" CG. I got these CGs because I went on 5 dates with Oki and his heart meter is red. Based on my playthrough, you need these to stop Hisami from taking you and unlocking this and the "good ending" CGs.
8
Oki & Okan's "good ending" CG. Same with their individual "good ending" CGs.
9-11
Sota's 5th date CGs.
12
Remi's 2nd date CG.
PAGE 17
1-5
Remi's dates CGs. Sorry, I can't remember which date CG #1 is from, but I'm pretty sure CGs 3-5 are from his 5th date.
6-7
Kovit's 5th date CGs. These are in the hospital after he got shot.
8
I could be wrong, but I believe this is Rald's 2nd date CG.
9-11
Rald's 5th date CGs.
12
Lenga's 2nd date CG.
PAGE 18
1-2
Lenga's 5th date CGs.
3-5
Okan's 5th date CGs. (I'm not completely sure if CG #3 is from his 5th date or an earlier one. Either way, you'll unlock it on your way to the 5th date).
6-7
Oki's 5th date CGs.
8-11
These CGs get unlocked after doing your first full playthrough of the game and starting a new game. A new intro will play out and these CGs will be unlocked. I can't remember if CG #11 appears during the intro or later in the story, but it automatically unlocks, so you'll be guaranteed to get it.
12
Part of Sota's "perfect ending" CGs. To get this, go on all 5 dates (5th date is the sex date). Also make sure that you have a high enough relationship with Oki & Okan (in my playthrough, I've gone to all 5 dates and my heart indicator is red with both of them) so that they'll save you from Hisami. Unlock these by going to the Extras menu and click on the kachapon figurines, then select which character's perfect ending story you wanna unlock.
PAGE 19
1-2
Part of Sota's "perfect ending" CGs. To get this, go on all 5 dates (5th date is the sex date). Also make sure that you have a high enough relationship with Oki & Okan (in my playthrough, I've gone to all 5 dates and my heart indicator is red with both of them) so that they'll save you from Hisami. Unlock these by going to the Extras menu and click on the kachapon figurines, then select which character's perfect ending story you wanna unlock.
3-5
Remi's "perfect ending" CGs. To get this, go on all 5 dates (5th date is the sex date). Also make sure that you have a high enough relationship with Oki & Okan (in my playthrough, I've gone to all 5 dates and my heart indicator is red with both of them) so that they'll save you from Hisami. Unlock these by going to the Extras menu and click on the kachapon figurines, then select which character's perfect ending story you wanna unlock.
6-8
Kovit's "perfect ending" CGs. To get this, go on all 5 dates (5th date is the sex date). Also make sure that you have a high enough relationship with Oki & Okan (in my playthrough, I've gone to all 5 dates and my heart indicator is red with both of them) so that they'll save you from Hisami. Unlock these by going to the Extras menu and click on the kachapon figurines, then select which character's perfect ending story you wanna unlock.
9-11
Rald's "perfect ending" CGs. To get this, go on all 5 dates (5th date is the sex date). Also make sure that you have a high enough relationship with Oki & Okan (in my playthrough, I've gone to all 5 dates and my heart indicator is red with both of them) so that they'll save you from Hisami. Unlock these by going to the Extras menu and click on the kachapon figurines, then select which character's perfect ending story you wanna unlock.
12
Part of Lenga's "perfect ending" CGs. To get this, go on all 5 dates (5th date is the sex date). Also make sure that you have a high enough relationship with Oki & Okan (in my playthrough, I've gone to all 5 dates and my heart indicator is red with both of them) so that they'll save you from Hisami. Unlock these by going to the Extras menu and click on the kachapon figurines, then select which character's perfect ending story you wanna unlock.
PAGE 20
1-2
Part of Lenga's "perfect ending" CGs. To get this, go on all 5 dates (5th date is the sex date). Also make sure that you have a high enough relationship with Oki & Okan (in my playthrough, I've gone to all 5 dates and my heart indicator is red with both of them) so that they'll save you from Hisami. Unlock these by going to the Extras menu and click on the kachapon figurines, then select which character's perfect ending story you wanna unlock.
3-5
Oki's "perfect ending" CGs. To get this, go on all 5 dates (5th date is the sex date). Unlock these by going to the Extras menu and click on the kachapon figurines, then select which character's perfect ending story you wanna unlock.
6-8
Okan's "perfect ending" CGs. To get this, go on all 5 dates (5th date is the sex date). Unlock these by going to the Extras menu and click on the kachapon figurines, then select which character's perfect ending story you wanna unlock.
9
Chef Haruo's (cafe) CG. As with the other NPC CGs, you unlock this by talking to them and by having a high relationship with a romanceable character that is linked to them. For Chef Haruo, it's Rald. For the most part of the game, they'll only respond with one-liners but will eventually have a longer conversation with you. When that happens, you'll know that you've unlocked the CG. It won't appear on-screen, but will automatically appear unlocked in the CG gallery.
10
Surfer dude's (beach) CG. As with the other NPC CGs, you unlock this by talking to them and by having a high relationship with a romanceable character that is linked to them. For the surfer dude, it's Okan. For the most part of the game, they'll only respond with one-liners but will eventually have a longer conversation with you. When that happens, you'll know that you've unlocked the CG. It won't appear on-screen, but will automatically appear unlocked in the CG gallery.
11
Mechanic's (garage) CG. As with the other NPC CGs, you unlock this by talking to them and by having a high relationship with a romanceable character that is linked to them. For the mechanic, it's Oki. For the most part of the game, they'll only respond with one-liners but will eventually have a longer conversation with you. When that happens, you'll know that you've unlocked the CG. It won't appear on-screen, but will automatically appear unlocked in the CG gallery.
12
Hunter's (shop owner at Central City) CG. As with the other NPC CGs, you unlock this by talking to them and by having a high relationship with a romanceable character that is linked to them. For Hunter, it's Kovit. For the most part of the game, they'll only respond with one-liners but will eventually have a longer conversation with you. When that happens, you'll know that you've unlocked the CG. It won't appear on-screen, but will automatically appear unlocked in the CG gallery.
PAGE 21
1
Guy at Central Park's CG. As with the other NPC CGs, you unlock this by talking to them and by having a high relationship with a romanceable character that is linked to them. For this guy, it's Remi. For the most part of the game, they'll only respond with one-liners but will eventually have a longer conversation with you. When that happens, you'll know that you've unlocked the CG. It won't appear on-screen, but will automatically appear unlocked in the CG gallery.
2
Pro Keoni's (M. Wood Uni) CG. As with the other NPC CGs, you unlock this by talking to them and by having a high relationship with a romanceable character that is linked to them. For Prof Keoni, it's Sota. For the most part of the game, they'll only respond with one-liners but will eventually have a longer conversation with you. When that happens, you'll know that you've unlocked the CG. It won't appear on-screen, but will automatically appear unlocked in the CG gallery.
3
Evan's (bookstore clerk) CG. As with the other NPC CGs, you unlock this by talking to them and by having a high relationship with a romanceable character that is linked to them. For Evan, it's Lenga. For the most part of the game, they'll only respond with one-liners but will eventually have a longer conversation with you. When that happens, you'll know that you've unlocked the CG. It won't appear on-screen, but will automatically appear unlocked in the CG gallery.
4
John's (guy in the hospital with bandages) CG. John is a curious case. You still have to keep talking to him, but I don't know if you need to have a high relationship with anyone in particular like the others. Either way, once you have a long conversation with him, the CG will unlock in the gallery.
5-12
I honestly don't know how these get unlocked, but these are threesome CGs. If I'm guessing, these CGs get unlocked if you have a high relation (maybe 5 dates and red hearts) with at least 2 characters. For example, in CG #5, it shows a threesome between Tomoki, Rald, and Kovit, so I'm assuming you need a high relationship (again, maybe 5 dates and red hearts) with both of them to unlock these CGs.
PAGE 22
1-4
Like CGs #5-12 on PAGE 21, I honestly don't know how these get unlocked, but these are threesome CGs. If I'm guessing, these CGs get unlocked if you have a high relation (maybe 5 dates and red hearts) with at least 2 characters.
5-6
If I'm not mistaken, these are from the Dr. Ken DLC. These CGs get unlocked on the 5th date.