Yuu's parents went on a trip, leaving him to stay home alone. Then came his neighbor Kiyomi, whom he had been asked to take care of. Yuu felt both joy and tension at the prospect of spending time with the aunt he had admired since childhood. But then Kiyomi's husband Shigetoshi arrived and began to ravage Kiyomi right there in someone else's home. After witnessing their act, Yuu couldn't sleep all night and finally mustered the courage to head towards Kiyomi's room...
