The Shinami couple work as teachers at the same school. The husband, who serves as an advisor for a club, is troubled by two delinquent students, Hiyoshi and Ichii. Before summer vacation, he caught them smoking. Unable to ignore it, he reports them, leading to their jersey numbers being taken away and a two-week suspension. Then, during the summer vacation period after their suspension ends, the husband is busy with club activities, so his wife Yuna takes over their remedial classes. The two, who received severe punishment, direct their strong anger towards Yuna and begin plotting revenge against the couple…
