Yuuta, an only child, accidentally witnesses his parents having sex. The shock and humiliation leave deep emotional scars. He becomes consumed with jealousy and rage at seeing his beloved mother used as an object for his father's sexual desires. Unable to suppress these feelings, Yuuta devises a new plan—to boldly expose his long-hidden intimate relationship with his mother right in front of his father. Torn between love and hatred, anger and revenge, Yuuta's heart spirals into turmoil. This act will become a life-changing event that shatters the family's fragile facade.