Junnosuke and Kazuhiko are a couple who live with each other. However, one day Kazuhiko gets drunk and sleeps with a female employee of the company and she gets pregnant.

The first part, "My Brother's Lover," tells the story of a gay man's sister falling for his boyfriend. Graduate student Takeo lives with his sister, but he can't bring himself to tell her about his gay boyfriend, Riku. When Riku comes over to their house to have sex with Takeo, his sister falls in love with him. The second part, "His Child," tells the story of Akihiko, a man who falls for his straight friend and ends up looking after his friend's baby at his request. His lover, Yuki, can't stand seeing the baby. Is balancing love and child-rearing just as difficult for gay men?