- An older sister who has always liked children and when she sees a boy. While hiding such a propensity, she works as a housekeeper. However, Kenta, a boy from a certain house, is a mischievous child and only puts out naughty little things. - An older sister who is confused by such Kenta but wants to be seen wearing a miniskirt to work. - An older sister who is taken by Kenta-kun with a smartphone, touches her panties, dives into her skirt and desperately endures. However, the escalating prank finally collapses self-control ...!