it's about this fat otaku with glasses he gets transferred into the ''dumb class'' where there are a bunch of gals they tease and bully him but one of the decides to follow him home and have sex with him just because, And then she discovers his belly isn't the only big thing about him and he becomes popular witth all the gyuarus in the class because he has a big dick.
Been looking for it all day haven't found it so any help is very much appriciated.