Tokyo Metropolitan Advanced Nurturing High School, a closed three-year high school. Homeless transmigrator Kamio Tatsuya just wants to spend his last three years here peacefully before adulthood, just to turn 18. But why is it that even this simple wish is constantly being thwarted? Reluctantly, for the sake of a peaceful life, he has no choice but to take matters into his own hands. Sakayanagi Arisu: He's amazing. I heard his parents are gone. I wonder if he'd be willing to change his surname to Sakayanagi. Ichinose Honami: Despite my best efforts, I can't defeat him. Ryuen Sho: I love his style of doing things. Having him as a teammate was definitely the right decision. Horikita Suzune: I was here first…