Translucent white skin. Soft-looking G-cup breasts. Voluptuous curves... The naked body of his stepmother that he peeked at was far too erotic to be called "a parent's naked body." "Those breasts... I wonder what they would feel like to rub?" Yuji stood in front of the bathroom again today, gazing at his stepmother Mio's body. But one day, as he was peeking in as usual, Mio in the bathtub suddenly began to fondle her crotch. Unaware that she was being watched, Mio comforted her body with her bold fingers. The voluptuous sight strongly provoked the teenage Yuji, and aroused in him inappropriate thoughts...