Your recent ask got me thinking, I do love a good age gap. Any chance you track BLs with age gaps on your magical spreadsheet, or can just remember ones that you have seen?
BLs With Age Gaps - Hyung Romances
So if the het version is noona romances, are these considered hyung romances? Eh, let's do that. For a lot of these BLs, since the seme is usually the older character, the age gap is standardized so not a big deal and not a plot point.
With very few exceptions, I'm not going to talk about shorter age gaps, by which I mean like FighterTutor or DeanPharm or JaeYoung & SangWoo, where the older boy is the seme and is older by a few years, because these are not really about the age. If that makes sense?
Instead I picked ones where, for me, the age is visually present and kind of a bigger deal in terms of life stage and narrative, e.g. one of them is still in school while the other is not... things like that.
We don't know the age difference Xia Yao and Yuan Zong, but Yuan Zong acts and looks quite a bit older. Censored before it concluded.
Well the alien/fantasy people are thousands of years older than their romantic counterparts, so yeah big age gaps. Censored from the get go but we all get it anyway.
So this is a dirty gaslighting crazy piece of Japan being SO Japan about this trope. But it sure is age gap. Established novelist with an intention to corrupt, bullies college kid into writing his porn for him with the intent to seduce.
My favorite version of this, younger seme older uke, 10 year age gap. I love this show so much.
Another age flip, only both characters are older, it’s office set, and added obstacle of boss/employee dynamic. God it’s so good.
Ryu is out in the world as a full on actor idol and Anda is still in university. The Japanese version has the same age gap.
YeonSeok remembers his past lives and is an established writer, he also looks older than HaYeon who is a new editor. So this BL feels very age gap. There isn't much hyung-ing tho.
Your bog standard ancient vampire falls in love with a college kid trope, only gay and Korean. It's good but it ends sad, but it certainly is a massive age gap.
EunKyu is an established chef with a successful business and HaeWon has just entered the workforce so there is some kind of age gap going on. They also act this way right away, instantly going with hyung.
HongSeok is a loan shark and clearly quite a bit older than college kid ShiOn.
Ace is the CEO of a company, although he looks younger he is probubly quite a bit older than Sky who is still in college. However, these two don't act at all like there actually is an age gap in play.
HIStory 2: Right or Wrong
Probubly the most typical execution on this list. YiJie is a lot older than ShengZhe and also his professor, since this is a teacher/student romance which is a classic age gap story.
HIStory 3: the BL that shall not be named & HIStory 4: Close to You
The side characters in H3 and cameos in H4 BoXiang and ZhiGang have a huge age gap, 12 years, and it is a big deal for their relationship.
YongJie is quite a bit younger than XingSi, not sure on the specifics but he's in middle school when XingSi is in high school and still in college when XingSi has his own business. Also the stepbrother trope.
See You After Quarantine?
Definitely an older younger dynamic with a college kid and an established businessman. Also SO flipping cute.
Chief & Tian must have a pretty big age gap.
This is not a good show, but side couple Khun & Kaow are great in it and this is my favorite version of an age gap: younger seme + older uke. Khun is in university and Kaow has a baking business.
Again Sib is quite a bit younger than Gene and the pursuer, man I love this dynamic. Since Gene is out of university and established in his career, I'm calling this one for age gap.
DanYok is an age gap, but it isn't really the point or the plot of their romantic arc.
Dear Doctor I'm Coming For Your Soul
Absolutely an age gap, I mean one of them is an immortal reaper. Also they confront and address the ultimate issue that one of them will age when the other one doesn’t. It’s poignantly handled, but I thought quite lovely.
Vietnam's age gap offering. He's the owner of the cafe and his boy is just out of university (?). It's very very cute.
Also Nation's Brother might qualify.
Others With Age Gaps but I'm Not Into it
Ossan's Love (Thai) triangle second lead
Waterboyy (Thai) side couple
Make it Right 2 (Thai) side het romance, very problematic
Call It What You Want (Thai)
The Immeasurable (Taiwan) short
Top Secret Together and Love By Chance both have sub plots of high school boys pursuing college ones, but the one didn’t go anywhere and the other went very very bad, so yeah... no. Although I would personally LOVE to see this done well.
You could make the case that Devil Judge also qualifies.