Setsuya discovers the horrifying truth about the "junk" affecting the women in the mansion, which has rendered them biologically unstable and trapped in a cycle of pain and pleasure. As a mysterious antagonist manipulates the situation and reveals the lethal nature of their condition, Setsuya struggles to save Kasumi and Fujino. Despite a desperate sacrifice to wake him, the antagonist reveals that the mansion has become a timeless prison, trapping everyone in an endless, inescapable loop.