Ever since childhood, the older sister has had a preference for children, hiding this desire while working as a maid. Over time, she began feeling aroused whenever she saw young boys, but kept this secret to herself and carried on with daily life. One day, a mischievous and naughty boy named Kenta arrived. He constantly teased her, and though she felt conflicted by his behavior, her exhibitionist tendencies led her to unconsciously wear a miniskirt while working. As Kenta escalated his antics—snapping upskirt photos with his smartphone, touching her panties, and even sneaking under her skirt—the older sister struggled desperately to suppress her growing arousal, but in the end, her self-control completely broke down...!