A mysterious erotic drama depicting the love affairs woven by the successive residents of a certain room. Director Fukamachi Akira, who knows pink films inside and out, has created an ambitious work depicting the ties of life and sex through the love stories of three couples who share the same room. A bird kept in a certain locked room has been watching over the residents. Ryuji (Shirato Katsunori) pressures his newly dating Miki (Tanigawa Aya) into living with him, but he has debts. A married woman ends up in the room after an affair with a university student. Saburo (Nakamitsu Seiji), whose wife and child have run away from him, enjoys life with Haruka (Hanazawa Lemon), who looks after him, but...

It's been two years since Kasumi chose the Kunoichi lifestyle and she now has a new enemy in Hattori Hanzo. Hanzo's wish is to penetrate the Ueda castle. So he enlists his own Kunoichi to seduce the gatekeeper, probing him for security loopholes.