Imagine your OTP cuddling on the couch while a massive blizzard rages on outside.
Imagine your OTP as Olympic ice dancers. They have the time of their lives on the ice. When they finish their performance, both go to sit and wait for their scores, holding each other with fingers crossed. When it is announced that they have gotten the highest score of the night and will be receiving a gold medal, both jump up, the crowd going wild as Person A grabs Person B and kisses them victoriously. Later that day, they attend the medal ceremony, holding hands on the podium while whatever their anthem is plays, tears in their eyes.
Imagine Person A finding out they like having their hair pulled during intimate moments. Person B then uses this to their advantage at any given opportunity.
Imagine your OTP at their wedding. When cutting the cake, Person A smashes a slice of cake into Person B’s face and smears it on their cheeks.
(Bonus if Person B does the same thing to Person A.)
Imagine Person A shampooing and rinsing Person B’s hair in the shower - whilst Person B gives Person A oral sex.
Imagine your OTP exchanging valentine’s day cards. Both cards end up being extremely cheesy or silly and makes both of them laugh before going to get dinner or watch a movie.
Imagine your OTP being teachers at a middle/high school. They’re really good friends (with the occasional not-so-subtle flirting) and their students see potential of the them being a thing. Their students drop hints every now and then about how the other is single and there is no time like the present. Finally, during free period one day, Person A asks Person B out, to which they happily say yes. They try to keep their relationship discreet but the students can’t help but notice how playful they start acting around each other and how bubbly they’ve become.
Imagine if Person A wore glasses/contacts and had really bad eyesight. Then one day, something happens to their glasses/contacts, either they get broken or get lost, so Person B keeps having to get up close for Person A to see them. Bonus if the close proximity lets them sneak in wee kisses.
Imagine person A of your OTP gazing affectionately at their child as s/he is working/doing something/busy. When person B enters person A notes how their child acts just like person B, but then their child does something unexpected that neither of them would do.
Imagine Person A is in a marching band and is performing in a holiday parade.Person B sadly states that they cannot make it to watch the parade but wishes Person A good luck.Near the end of the parade route Person A happens to scan the crowd,only to see Person B waving and smiling as Person A finishes the march.