One day, the uncle visited while his niece Himawari was home alone, bringing her a souvenir. Himawari, whom he hadn't seen in a long time, seemed to have started climbing the stairs to becoming an adult woman. However, unable to resist the temptation of Himawari's unguarded behavior, the uncle lost all reason and had no way to maintain his sanity... Moreover, it is said that the uncle had also taken advantage of Himawari's sister, Kanae!
