Synopsis

The story follows nocturnal creatures called “Yako” who attack humans and drink their blood.

The main character, Reiya, unwillingly becomes a “night traveler” in order to save his childhood friend Yuki, for whom he has an unrequited love. While escaping from the violence of night hunting, he and other boys who live in the darkness of the night gather at live music venues in order to fight their bloodlust. Together they form a band called “404 not found” and become passionate about music. Each of them have their reasons and circumstances for why they are forced to become night travelers, and their feelings for one another are complicated. Reiya, who has become the band’s vocalist, finds himself relentlessly targeted by Kurose Takumi, the leader of the night hunters who wishes to exterminate the Yako.