On the night before her husband leaves for a work assignment, Kyoko, overwhelmed by desire, makes deep love with him and finds fulfillment. Later, drunk and returning to her son's house, she begins masturbating. At that moment, her son sneaks into the room and discovers her, secretly watching her erotic scene. Unable to resist, she immediately starts sucking her son's cock, and the next morning, unable to hold back any longer, she sneaks into her son's room, beginning their forbidden relationship. This shocking development unfolds in full.