第四集

After not having sex for two years, Rei's gentle caresses and tender kisses move Ichiko to tears. Meanwhile, Mitsuki faces a bleeding Otoya in a hotel room. Infuriated by Otoya's refusal to sleep with her because of Ichiko, Mitsuki had impulsively stabbed him. Hurt and in shock when she learns why he was attacked, Ichiko finally confesses her true feelings about their special arrangement.