Gaku pierde la esperanza de llegar a ser matemático y se siente sin rumbo, hasta que el chef estrella Kai lo lleva a su restaurante y le abre las puertas de un mundo nuevo.

Wakaba saves her classmate Koki who was being bullied. From then on, people who are involved with Wakaba are killed one after another. When the murderer is found out, Wakaba realizes what true love is.