Call of the Night manga volume 6 features story and art by Kotoyama.

Although Ko happily goes on a sightseeing trip to Tokyo with Nazuna, he tries to warn his childhood friend Mahiru about the dangers of dating vampire Kiku. And that’s before Ko learns a disturbing secret about her!

Meanwhile, Detective Anko pursues one of Nazuna’s vampire friends with some stabby extralegal justice in mind. To prevent Anko from exploiting their weaknesses, the gaggle of vampire women must delve deep into their pasts. Unfortunately, Nazuna can’t remember anything from her human life! Will a decades-old appointment card be the clue to finding out who “turned” Nazuna...and why?

Call of the Night manga volume 7 features story and art by Kotoyama.

When Nazuna and the gang track down the secrets of her past, every answer only leads to another question. Who turned whom, exactly? What chain of events and relationships made Nazuna into the—uh—person she is today? Midori, on the other hand, would rather her human existence remain buried. But then she meets one of her “offspring” with a mysterious secret. Meanwhile, detective Anko pursues her vendetta against all vampire kind, invading their private lives and spaces!

Call of the Night manga volume 8 features story and art by Kotoyama.

A visit to the night school Nazuna attended years ago yields new insights into her forgotten past. Niko, her former vampire instructor, reminds Nazuna about her first friend, Kyoko. To aid in the investigation, Ko must pretend to return the affections of a boy-crazy student. Then, as more clues are discovered, a tale of friendship, betrayal, and murder unfolds...

Call of the Night manga volume 9 features story and art by Kotoyama.

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!

Call of the Night manga volume 10 features story and art by Kotoyama.

Kyoko launches her ambitious master plan to rid the world of vampires. How can Ko and Nazuna stop her? Then, when Ko gets injured, it leads to questions about the state of his humanity. Afterward, some relationships get mended while others are broken. Plus, a new haircut!