♂ m

Bookstore owner and single. He is always envious of his childhood friend Kouhei's competence and successful life. As the feeling gets stronger when Kouhei is married to his wife Yui, he plans to steal her away from him.

♀ f

The young housewife next door. She is still student but good at housework and devoted to her husband. Because she was raised in strict environment, she is ignorant about sex and still hasn't had her first experience even with her husband.

♂ m

Childhood friend of protagonist. Good at everything and popular. He just got married to Yui but had to work away from home for a while. Without any suspicion, he entrusted his wife to the protagonist ...