Youth suspense story where Ren Ozawa, who appeared on various popular stages and acted as a variety program and voice actor, serves as a high school teacher for the first time. An incident occurred on Valentine's Day when a student died due to poisoned chocolate. The teacher, Nishina (Ozawa), who is cold and ridiculed by students, tries to unravel the truth
Kondo Isami, a third-year high school student, has good grades but he is forced to decide which path to take because of his family’s financial situation. One day, he learns about the government-affiliated Defence Academy where students are not only exempt from admission fees and school fees, but are given an allowance every month.
