[5 Cosplay Changes x Confinement Ecstasy Training] A cute cosplayer named Hats descends upon an otaku club (or otaku circle for short) where unpopular boys gather!! However, when the otaku find out that she has a boyfriend and has already had sexual pleasure with him, they explode with rage and confinement rape her!! Her pleasure training escalates as she becomes a slutty human toilet, with "aggressive sex, cowgirl sex to keep quiet, group deep throating to make her cum with slimy toys, and gang bang with convulsing orgasms".