Popular female manager Chika is invited to a public bathhouse after a judo club practice. The men's lust intensifies in the changing room and bath, turning the operating bathhouse into a stage of madness. Unaware of the members' intentions, Chika gradually succumbs to temptation. The bathhouse owner and other male customers join in, advancing their plan to assault her. Escalating acts of humiliation spread from the changing room to the bath, spiraling into a chain of insanity within the open bathhouse. Here unfolds the ultimate scenario where the school's top female manager is completely tormented, body and mind, on the spot.