Yuka, a mother who lives with her son Yohei on her husband's single assignment. One day, my son's classmate Yuki visits the house. When the bully Yuki learns that Yohei's mother is a good woman, she sets a trap to make her ripe body a thing. Yuka's body, which was sexless with her husband and was unconsciously frustrated, could not resist Yuki's desire and reminded her of the joy of being raped. A mother who is dominated by a young and strong cock of her son's classmate and falls into a whirlpool of pleasure.