Devils' Line

Tsukasa is an ordinary college student whose life takes a terrifying turn when she is targeted by a devil—a vampire-like predator capable of hiding seamlessly within human society. She is rescued from the attack by Anzai, a half-devil who channels his supernatural abilities toward protecting humanity. Operating out of Tokyo, he serves as a dedicated member of a covert police task force specifically designed to investigate and combat crimes committed by devils. Following the incident, Anzai remains close to Tsukasa to ensure her continued safety. As he watches over her, the two begin to develop a fragile but undeniable connection. However, this growing attachment introduces a dangerous complication for the half-devil investigator. Anzai has always adhered to a strict personal vow never to consume human blood, maintaining absolute control over his darker instincts. Yet, as his feelings for Tsukasa deepen, he begins to fear that their bond will push him to his limits. The closer they become, the more severely his iron-clad rule is tested, threatening to unravel the careful balance he has built between his monstrous nature and his duty as a protector.