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?