Cross x Regalia

A high school student named Inumi Haserou works as a part-time bodyguard for 1000 yen per job. While in Chinatown, he encounters Nata, a girl who claims to be a sage and collapses in an alley. Taking it upon himself to protect her, Haserou finds his quiet routine disrupted when a group of vampiric beings known as "Demonic Sages" begin attacking them. These creatures feed on human energy and are after Nata, believing she possesses a weapon that can render them powerless.