Kouki Nishina, a salaryman who is suffering from mental instability, gets into an argument with his girlfriend, Sawa Kimishima, who end up killing. Kouki had lost his memory of killing her. In the meantime, Yuu Ushizawa, a temporary employee of the same company, is playing with such a quiet Kouki as a sexual toy, since she was sexually aroused while watching men suffering. For some reason, Kouki loses consciousness again... see more