Takahashi was the top student in his grade, with an impeccable attitude and no behavioral issues. Respected throughout the school, he nonetheless felt unfulfilled. Achieving perfection in everything made life boring for him. To alleviate his boredom, he decided to turn a teacher into his personal plaything. The teacher he targeted soon left the school and resigned within days. His next target was Mayumi Komiyama, a second-year teacher.