After separating from her husband, Kei has been living with her son Susumu for ten years… Raising Susumu alone, he has grown up, and the life of juggling work and child-rearing has started to settle down. One day, Kei found a crumpled tissue in Susumu's room 'Susumu is finally at that age...' Kei felt both joy and loneliness about Susumu's awakening sexuality. However, that night, as Kei was falling asleep as usual, a man's shadow crept up to her. Fumbling with her body, Kei woke up sensing the presence and saw…
