Details

Asamiko lives in her sister Kanna's condominium in Tokyo to attend a university in Tokyo. Kanna was on good terms with Asamiko's boyfriend Takashi, and seemed to be watching over them, but secretly aimed at Takashi. Then he puts Ryuji in a "trap" and calls him to deal with his sexual desire, but Ryuji can no longer bear the feeling of guilt towards Mamiko.