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.

Wakaba Mashita is an ordinary elementary school student living in rural Japan. One day, she saves her classmate Koki Kobayashi, who was being bullied. From then on, people who are involved with Wakaba are killed one after another. Who is the murderer? What is the purpose? When the murderer is found out, Wakaba realizes what true love is.