It's been a while since his father's new wife, Reiko, came to live with them. But Yuta still hasn't been able to open up to her. Her voluptuous body line. Her unconscious sex appeal. Reiko is too erotic to call her a mother. Just looking at her makes him erect. But Reiko is his mother. Yuta desperately tries to suppress his emotions. Meanwhile, Reiko, who has no idea about Yuta's feelings, approaches him with lots of body contact in an attempt to open up to him... The conflicting feelings between the two leads to an unexpected development.