Gyakuten! Busai-gakuen -Nyotaika Fuku Bancho- by Eroe - Adult Sex Game

A meteorite falls on the former leader of the school gang and some alien virus turns him into a girl.
While he was groping his boobs, someone stole the meteorite, which is needed to make a vaccine.
Now the hero is going to have a lot of adventures in his new body while searching for the stone.