"I wonder if the next teacher will break down?" Takahashi, a student who is respected at school, feels that the current situation is unsatisfactory. He was boring because he did everything perfectly. So he made his teacher his plaything to escape boredom. In less than a few days, the teacher who got his attention stopped coming to school and retired. The next target was Mayumi Komiya, who has been a teacher for two years.

「今度の先生は壊れないかな？」学年トップの成績で生活態度も問題なし。校内でも一目置かれる生徒の高橋は現状に物足りなさを感じている。何をやっても完璧にこなしてしまう彼は退屈だったのだ。そこで彼は退屈しのぎに教師を自分の玩具にするようになった。彼に目を付けられた教師は数日も経たないうちに学校へ来なくなり、退職してしまう。次の標的は教師になって2年目の小宮真由美だった。