+ They find a reason to hold hands or do it accidentally
+ They/one of them have a death grip when cuddling
+ The “let’s be friends forever” talk
+ Play fighting/teasing to annoy them coz its funny
+ making food together
+ Reassuring them when they get scared
+ the “you talk about me?” question
+ Poking each other for attention
+ “I’ll hug you first” competition
+ giving each other nicknames
+ Fighting over food
+ sharing food that the other’s taken a bite out of
+ food/pillow fights
+ board/video games
+ they get reminded of the other’s likes and dislikes in everyday life
+ they get too close when naked
+ accidentally touch or face plant into others private parts
+ “I’m looking after you because you’re ill and that’s that”
+ singing in a public place together
+ When one talks about something they love
+ When one let’s the other rant
+ Bowling/movies/dancing/fort building
+ personal question/trivia/secrets
+ playful revenge
+ “I’ll show you my secret hobby/guilty pleasure”
+ deliberately holding hands (most likely leading to a confession)
+ “is this a date?” (Leads to confession)
+ private lessons/teaching the other
+ close together in a tight space
+ knight in shining armour
+ forced to kiss
+ flirting/winking
+ lingering touches and hugs/held gazes – especially effective if the reserved one is doing this
+ the “you’re special to me” talk, without the “no homo”
+ accidental love letter/confession in found diary
+ competing with others together
+ sleeping in the same bed
+ people forcing them together/having to do activities together
+ accidentally confessing they’d kiss the other/accidentally kissing the other
+ operation jealousy
+ getting the other presents/doing stuff for the other
+ annoying the other to get their attention
+ flattery and compliments
+ getting in the others way/ preventing them from doing stuff so they won’t leave
+ calling each other cute/attractive
+ waiting in the rain for the other at the meet up point
+ helping them after a fight/ when they get drunk/ when they get upset
+ pretending to date
+ head on the other’s lap/shoulder
+ one ruffles the other’s hair
+ catching them doing something stupid/ being a dork
+ “let me read your book/ see your art/ listen to you play/sing”
+ taking photos together
+ sharing clothes
+ pinning one to the floor/wall
+ dressing the other one up/ terribly doing the other’s make up
+ you have to be close to share an umbrella
+ studying together
+ massage
+ dragging them by their wrist/clothes
+ fixing the other’s bedhead/ “there’s something on your face”
+ telling a story together about something they did
+ feeding each other
+ talking about anything from tv shows to why humans are alive
+ visiting/calling/texting because they’re bored/to wish them happy birthday/Christmas
+ getting them out of situations they predict the other will be uncomfortable in
+ telling each other about their quirks
+ going places together
+ TICKLING
+ pranking each other
+ swearing at the other affectionately/ telling them “don’t be a dick” because the other is being rude to other people
+ putting up with something one person doesn’t want to do because the other wants to do it(Note: not all of these work for OTPs that are strangers, some have to have known each other for years to do these things!!)
I’ll take a handful of these as prompts, original character pairings, Women of Xal, or Mystic Messenger