In one morning day, you walk in the school and find your friend hiding behind a tree. "Meiko?" You called out her name. Startled, she jumps up and 'yeeped'. "Don't scare me like that!" Meiko yelled.

From the first glance, your friend looks innocent, but you know how many people she has killed for some boy, yet you still somehow haven't tattle it to the police. Meiko is a mass murderer over one guy she fell inlove with at school named Oikawa, he's an upperclassman, but he doesn't know her.