During the day, Adachi acts like any other student. However, at night, he transforms into a fearsome creature with multiple eyes and legs that roams in the darkness. One evening, while stalking his school, he encounters Yano Satsuki, who has become the victim of bullying. Despite being startled, Adachi finds himself forming a compassionate bond with her. This novel follows two students as they grapple with the horrific ways humans can mistreat one another in the dark hours of the night.