I'm gonna be so for real: the real introvert "date" between a geek and his geek bro turned into a shortstack (literal) succubus isn't going to otaku shops like they always used to; it's actually one of the pair going to the other's house, never leaving that house, doing some normal activity like playing Smash Bros or watching a seasonal anime for like 30 minutes, and then pivoting hard to heavy petting followed by artlessly fucking until someone is too tired to do anything else and falls asleep.
These two should be exploring each others' bodies pretty much the instant their awkward virgin minds succumb to the pink brain fog of lust.