Shinya Yoshino, a high school student, faces persistent harassment, resulting in a life of isolation without any companions. Little do people know, Shinya is a half-human, half-demon creature with an unquenchable appetite for human flesh. However, despite this, he makes a promise to his demon father not to harm humans, leading him to fight against his primal urges and live a typical life. Will Shinya overcome this challenge, fulfil his pledge to his dad, and keep his actual identity hidden?