Kanna Uno, neglected by her husband, turns to her son for emotional comfort, seeking solace in their physical relationship. Though mother and son, their bodies fit together in an unbelievably perfect way, drawing them rapidly into the world of incest. Despite knowing that sex between parent and child is unnatural, Kanna cannot suppress her desires and continues to deepen their forbidden bond. Meanwhile, her son struggles to contain his growing sexual urges. Sensing his passion, Kanna's body gradually grows hotter with arousal. Every time her husband leaves the house, the pair share increasingly intense and passionate kisses, their relationship growing ever more complex and consuming.