A normal, quiet high school life is all Yuta Hiragi wants. He enjoys his gray lifestyle of going to school normally and going home normally at Ichigano High School in Sapporo, Japan. He keeps to himself at school, has a best friend, and even someone he likes. But what he doesn't know about himself could be the end to his desired lifestyle. What lurks within this normal high school student and how will it affect him and everyone around him forever?