Call of the Night manga volume 11 features story and art by Kotoyama.

Now that Ko and Nazuna know the identity of the vampire responsible for the deaths of Kyoko’s parents, they are on high alert. Is it possible to seek justice - or to at least prevent her from wreaking another path of destruction? The answers will test Ko’s human friendships as well as his own humanity...

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 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 a second attacker arrives on the scene - and she’s targeting both humans and vampires!

Call of the Night manga volume 13 features story and art by Kotoyama.

Ko’s powers increase formidably and dangerously. Nazuna learns a new vampire rule about love that could be her undoing. To make matters worse, an enemy discovers the object capable of destroying her! Meanwhile, while Azami and Susuki continue to pursue heartless vampire Kiku, Kiku meets... Mahiru’s mom?

Call of the Night manga volume 14 features story and art by Kotoyama.

To sign up for his class trip to Hokkaido, Ko has to, well, go to school! His estranged friend Mahiru decides to travel to the island as well, along with an unwelcome companion (unwelcome to Ko and company, that is). And things only get worse when Ko’s fanged female followers join him and Akira on the train ride there!