Mina, a career woman and designer of underwear, one day receives a request from her uncle to take care of his son Shota. Although she is reluctant, she agrees. However, Mina also has a business trip, so she reluctantly brings Shota along, figuring it's fine since he's a boy, and they stay in the same hotel room. Despite being a boy, the arrogant and perverted Shota messes with the underwear Mina brought for an exhibition, angering her. Infuriated, Mina slaps Shota. Enraged, Shota decides to get revenge on Mina that night, playing a prank on her while she is asleep.
