Sana Kurata is a bubbly, popular child actress whose sixth-grade classroom has been thrown into chaos by Akito Hayama, the sullen 'boss' of the boys who keeps two teachers in line with secret blackmail. Furious that his antics keep wrecking class, Sana sets out to take him down and restore order. As she pries into Akito's home life, the standoff between the two slowly turns into something closer.