Call of the Night manga volume 12 features story and art by Kotoyama.
Our human friends are attacked by a mysterious male vampire. Luckily – or unluckily, depending on your point of view – Ko’s liminal half-vampire mode is growing ever more powerful. Who turned the attacker, and what is he after? No sooner are these questions answered than new ones arise as another attacker arrives on the scene. This time it’s a mysterious female vampire, and her targets are both humans and vampires! But why…?