Even though she has just remarried, Sumire (Sumire Kurokawa) has no interest in her husband, who is constantly away on business. Furthermore, she has difficulty opening up to her stepson, Akira, and feels lonely both physically and mentally. Just as her body reaches its limit of throbbing, Akira confesses that he has always loved her. "I want to comfort you, even if it's just while my father is away," Sumire says, and he accepts her sincere feelings, on the condition that her husband returns home. However, Sumire's Kokoro is shaken by his intense thrusts that don't stop even after she has come...