Mariko comes to Tokyo alone to take a winter course at a cram school. However, the apartment she is staying in is occupied by two single men, making it a dangerous and inappropriate place for an adolescent, 18-year-old girl. On her uncle's advice, she dressed as a man and her residents didn't realize she was a woman, so she decided to study hard... A little naughty runaway girl has something more important than studying, a little devil who is driven by sexual urges and charms men one after another with velvet kisses! Ah, Tsuna Kimura, ah, doting.
