Call of the Night, Vol. 9 (manga)

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... The tragedy of vampire hunter Anko's past and her former relationship with Nazuna is finally revealed. But old ties don't always lead to new ones...

Then, on Halloween, while Ko suffers through a date with Rila, Anko goes on a rampage-and our gang of vampire frenemies isn't her only target!