[Cosplay 5 Transformation × Captivity Ecstasy Training] A cute cosplayer suddenly appears at "Otasar," a geek club for socially inept men. When the otakus discover she already has a boyfriend and is sexually experienced, their rage erupts—triggering a brutal confinement session. From rough sex and gagging mounted sex, to retaliatory group deep throating, slippery toy orgasms, and convulsing climax gangbang, she is systematically trained into a depraved cumdump, descending deeper into pleasure-fueled enslavement.