Kuroki Renji glides through high school like a ghost. He is top of the class, handsome, and his voice is deep enough to make girls blush. He smiles perfectly, speaks politely, but inside he watches people the way a cat watches birds—curious, detached, and faintly disgusted.
Then Kageyama Mio steps onto the morning bus and asks him a weird question, “Can a human be born as an Akuma?”
From that single conversation, Renji's life enters a watershed moment.
Mio and her older brother Ryo carry an old family secret that keeps them prowling the island at night.
The feared delinquent Ryujin Daiki keeps running into Renji at the worst possible moments.
The dazzling transfer student Serizawa Akane, idol of the entire school, seems far too interested in Renji.
As students start vanishing, and strange rumors spread about a shadowy man in a trenchcoat lurking in the island, the sleepy Shiomizu Town wakes up to an evil that mortal eyes cannot see.
Being human starts to feel optional…