Listen I know I wrote stuff for Distress Signal but you must know I am a Willry shipper first and foremost, toxic yaoi is in my blood so please have some of my HCs:
William and Henry steal glances at each other while they're at work, even when they know they can be spotted by other people
Henry is worried about William's weight loss post-springlock-failure-surgery, so he often brings him little treats or stuff to eat in the office
William plays the piano whenever they're at Henry's (he doesn't have one at home). For some reason he always plays Swan Lake and he plays it so softly it brings Henry to tears almost every time
William sometimes finds himself tapping fingers on the tables or counters as if piano keys were there
Henry knows the pieces he plays so well he can almost hear them in his mind whenever he sees Will tapping his fingers
Even post springlock-failure, William is surprisingly athletic. Which is why he's always the one getting things/toys from either high or otherwise unreachable places whenever kids leave a mess. It amuses Henry to just sit back and watch him contort to fit up the slides( i know there's no slides at FFD and FFP but indulge me please) or disappear into the pit (no pun intended lol) while trying to recover silverware
Henry is way more short-tempered than Will. Most of the time, he's the one scolding employees while William stays out of sight, only to come out and apologize later on behalf of him. He doesn't like shouting.
They both independently know MORSE code, unbeknownst to each other. One time, while Will is playing an imaginary piano on a table, he taps "I-L-O-V-E-Y-O-U" in MORSE. Cue Henry spitting out his water so hard he almost chokes.
The first time they kiss they're both in their respective mascot costumes, which makes the kiss incredibly awkward. It happens one night after rehearsals for a performance, when it's just the two of them. It takes them approximately two minutes and another almost springlock-failure to climb out of their costumes and make out on a table.
William is not fond of the cologne he wears, but Henry has commented once saying that he smelled nice. After that, he always makes sure to leave the house after basically dousing himself in it.
Henry adores the idea of teasing Will. He has stolen minutes multiple times while they're in their office, giving him hand until he's hard as a rock before he "suddenly" remembers they have to do something around the restaurant so the finish will have to wait 'til later. Cue William walking around Fazbear Family Diner while carrying a box in front of his crotch area, silently plotting revenge.
While there are some days of teasing, there's also some days where they steal away every moment they can to just make out and maybe a quickie or two.
They love karaoke. No need to get drunk, if they're out together in a bar you'll find them screaming to Elvis/Aerosmith/Fleetwood Mac/honestly whatever the karaoke machine has
While William tries to match Henry's horribly out of tune voice when they're together, he is a fantastic tenor. Henry finds out one morning early at the restaurant, when he overhears Will singing Love Me For A Reason.
They often have "dates" at the Diner after hours. It's usually just the two of them chatting while eating a burger and a soda.
A little while after their little "thing" (read:affair) has started, they find ways for Bonnie and Fredbear to be closer on stage whenever they can.
One time at William's, while all the kids are at summer camp, Henry traces and kisses every single one of Will's scars before eventually making love to him. It's still one of the most intense memories William has ever held on to.
They never explicitly say "I love you" to each other, but they often tap it in MORSE, seldom attracting weirded out glares from patrons who also happen to know the language
They are each other's last thought before they (PERMANENTLY) die
