As a housekeeper at a certain mansion, 'Sister Akari'. Because her mother is on a long-term overseas assignment and is away, Shota, feeling lonely, distracts himself by playing with Sister Akari. However, influenced by his mischievous friends, Shota, while pretending to be lonely, keeps playing pranks on Sister Akari's big butt. He sets up a nighttime prank on Sister Akari, who is completely at ease...
