(Also before commenting since messages are gone I only rp over discord, so once you comment I'll give you my user so you can add me if you don't have me added already)
OC and Character used to be best friends, until OC declared they had a crush on character. They got pretty brutally rejected, but then a few months later Character suggested the idea of friends with benefits. They stayed like that for awhile, until Character realized their feelings and confessed..but OC had already started talking to someone new, so they ended up breaking things off. A couple months later, OC and their new partner are doing well, together at a party..until Character shows up. OC and Character do everything in their power to ignore each other, but end up hooking up that night. They promised each other it wouldn't happen again...until it did. One day, the two of them weren't so careful, and OCs partner ends up catching them..
