"Your mom is really beautiful, you know," a friend's words made Masaru start to see his mother as a woman. One night, Masaru's mother, Miho, tried to seduce her husband for sex but was rejected. Unable to control her sexual desire, she masturbated next to him. Masaru accidentally woke up and saw Miho masturbating, which intensified his feelings towards his mother as a woman. Seizing the opportunity while his father was away on business, Masaru repeatedly confessed his feelings to Miho. Overwhelmed by desire and emotion, Masaru finally had sex with Miho in their home alone, just before his father was due to return.
