Despite her slender figure, Reiko Kobayakawa is a cool and beautiful woman who plays the role of a mother with big breasts. After losing her husband, she lives alone with her son. As her son grows older, she begins to see her late husband's likeness in him, gradually awakening sexual desires. One day, driven by jealousy toward her son's girlfriend, she finally crosses the line and becomes physically intimate with him. This forbidden act becomes part of their daily routine, deepening their intimate mother-son relationship, and they make love almost every day. This work captures their taboo relationship through digimo recording.