Kazuya, her son, gradually began to develop an unusual interest in his mother. It started when he accidentally saw her trimming her pubic hair in the bathroom. After that day, Kazuya began sneaking into the bathroom to spy on his mother. One day, he stumbled upon his mother masturbating. From then on, Kazuya's heart became entangled in a complex whirlpool of emotions, where love and lust for his mother intertwined.