A man who is often out drinking at night with Tonio and Matsuda.

Wracked by insomnia and wanderlust, Kou Yamori is driven onto the moonlit streets every night in an aimless search for something he can’t seem to name. His nightly ritual is marked by purposeless introspection — until he meets Nazuna, who might just be a vampire! Kou’s new companion could offer him dark gifts and a vampire’s immortality. But there are conditions that must be met before Kou can sink his teeth into vampirism, and he’ll have to discover just how far he’s willing to go to satisfy his desires before he can heed the Call of the Night!
 
(Source: Sentai Filmworks)

[Profile (TsFactory)](https://tsf-official.com/talent/koki-koyasu/)

Son of [Takehito Koyasu](https://anilist.co/staff/95160/).

An italian voice actor and ADR director, mostly known for his roles as [Yuugi Mutou](https://anilist.co/character/1374/) and [Atem](https://anilist.co/character/1375/), [Rock Lee](https://anilist.co/character/306/), [Jaco](https://anilist.co/character/135959/) and [Yuuga Aoyama](https://anilist.co/character/127042/).

[Website](https://benoitfort.com/) | [Twitter](https://twitter.com/benoit_fort) | [Instagram](https://www.instagram.com/benoitfort/)

One sleepless night, Ko slips out to walk the streets. Life after dark is a revelation! When flirtatious Nazuna invites Ko to spend the night at her place in an abandoned building, he’s stoked! But then he awakens to kisses on his neck with a little too much bite to them... Is it just the delicious taste of his blood that makes her meet him night after night for late-night adventures, conversation and...naps? Or something else? Then, when a cute girl from Ko’s past shows up and competes for his attention, his budding relationship with the undead is put to the test!
 
(Source: Viz Media)
 
Notes: 
-Seventh place of Tsugimanga 2020 Award in the Manga Category. 
-First place of Daruma 2023 Award (France) in the new manga category (released in 2022 in France).

Kai