After being told by his friend Himori "Your mother is so beautiful, isn't she?", Takuro begins to become conscious of his mother. Seeing her unprotected, such as wrapped in a towel after a shower, reinforces her romantic feelings. When his father went on a long business trip, he boldly confessed to his mother, but he was easily carried away but could not control his emotions, bringing out her likes and dislikes every day. One day, she got angry when she saw her masturbating in her mother's pants.

DASS-115 My lustful stepmother