Wait a Minute! Ore ga Neko Toka Kiitenai!
seme and uke were friends in high school. uke asks for seme's second button at graduation and seme kisses him and proposes they date even though seme was always straight before. now they're in uni and dating for a couple years. seme overhears uke talking to his friend and uke admits seme is not great in bed. so seme brings it up with uke and uke says he'll teach seme how to do it well. actually uke's always wanted to top seme, but held back cuz he didn't want to disgust seme who's always been straight. so seme has a great time being bottom. then he returns the favour and now he's good at topping uke. then they go to high school reunion and kinda get made fun of by some rude asshole for being gay. seme stands up for uke and says he's the bottom actually. and then they go home to avoid the party. and then uke finally sees this as a chance for him to top again and he does. i guess they will be switch from now on...
Pygmalion