Yashiro household is a well-regarded family consisting of an elite salaryman husband, a beautiful wife, and a high-achieving son. However, the husband is often away from home or comes home late, leaving the wife to handle all household matters, including childcare. The wife, Kyouko, has been feeling stressed and frustrated due to the lack of intimacy since their child was born, but she tries her best to be a good wife and mother. Meanwhile, their son Ryouta is struggling with his declining grades, and unbeknownst to Kyoko, his newfound interest in sexuality is the cause. Eager to experiment with his newfound knowledge, he begins to target his beautiful mother.