A delicate relationship where the heart is family, but the body belongs to someone else— A week with a stepmother who is bound to make mistakes. (Rio Asahi, VENX-363)

Rio married a man much older than herself. She quickly became close with her husband's stepson, Takuya, who was about the same age. She thought that if she took her time, they could become real family. Just as she was thinking this, Takuya told her he had fallen in love with her and saw her as a woman. Realizing that Takuya was a man, her body began to stir. To make matters worse, her husband had to go on a business trip for a week… Rio and Takuya's relationship rapidly grew closer.