Call of the night, vol. 18 (Viz Media)

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...Now that half-vampire Ko has destroyed her entire building, Nazuna must find a new home fit for a vampire.

Meanwhile, Ko begins attending school in the daytime again, forcing him to deal with, well, people. Then, will Nazuna's developing feelings threaten the object of her affection?