Call of the Night. Volume 4: Kotoyama

Antisocial, dorky boy seeks fun-loving, sexy vampire for blood-sucking and transforming into her minion.
One sleepless night, Ko slips out to walk the streets. Life after dark is a revelation! Especially when he meets flirtatious Nazuna. Except that she's a vampire. That's okay. He wants to become a creature of the night too. But transformation doesn't come that easily...
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 Cafe 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...