This doujin is based off the Eroge Discipline and the story goes like this – after a lost baseball match, Otokawa becomes Morimoto’s pet, who in turn coerces her into becoming the cock sleeve of some fat guy. The fattest, dumbest Otaku kid in the whole school. And he’s having his way with her for three months, until Morimoto arranges a little marathon gang bang session for Otokawa, until the Grand Finale hits…