Devils' Line

Tsukasa, a college student, is saved from a devil attack by Anzai, a half-devil who works for a secretive police unit handling supernatural crimes in Tokyo. Though Anzai uses his abilities to hunt rogue devils, he struggles to maintain his strict rule of never feeding on humans. As he protects Tsukasa, the two grow closer, and Anzai worries their connection might push him to break his vow.