Yua Nanase, who had never had sex with only the person she liked, named actress Ai Hoshina, who is currently on hiatus, as a lesbian upon her retirement. Yua believes that drinking the bodily fluids of someone she likes and receiving pain from them are expressions of love. Ai is bewildered by this. The two openly discuss their backgrounds as AV actresses, attempting to bring each other closer through acts like drinking urine, slapping, and choking, but the filming is interrupted... Nevertheless, they still try to face each other, a '10 promises for happiness' given from friend to friend.
