Call of the Night manga volume 4 features story and art by Kotoyama.

Nazuna can’t let her guard down for a second now that a flock of hot vampire women is interested in Ko’s hot blood! Then, when she takes a shift at a Maid Café where the customer is always right, the vampire is always wrong! Akira meets the girl Ko rejected before he met Nazuna, and Ko meets a private detective searching for someone he knows. Plus, a late-night visit to Ko’s school to ghost bust spooky legends leads to a thought-provoking lesson about the drawbacks of giving up your humanity...