Mystery (778)

A peculiar transfer student named Ougi Oshino has just arrived at Naoetsu Private High School. She is quickly introduced to senior student Koyomi Araragi by their mutual friend Kanbaru Suruga, in hopes of obtaining advice regarding a strange discovery she has made. After taking a look at the school's layout, Ougi notices that a classroom has appeared in an otherwise empty area—a place that should not exist.

Unsure if this is the work of an apparition, Araragi and Ougi attempt to unravel the truth behind this enigma. But Araragi soon discovers, after finding himself locked in with Ougi, that the room holds the memory of an event he had long since forgotten.

No longer truly human, Koyomi Araragi decides to retrieve Kiss-shot Acerola-orion Heart-under-blade's severed body parts that were stolen by three powerful vampire hunters. Awaiting him are Dramaturgie, a vampire hunter who is a vampire himself; Episode, a half-vampire with the ability to transform into mist; and Guillotinecutter, a human priest who is the most dangerous of them all.

Unbeknownst to Araragi, each minute he spends trying to retrieve Kiss-shot's limbs makes him less of a human and more of a vampire. Will he be able to keep his wish of becoming human once again by the end of his battles?

After helping revive the legendary vampire Kiss-shot Acerola-orion Heart-under-blade, Koyomi Araragi has become a vampire himself and her servant. Kiss-shot is certain she can turn him back into a human, but only once regaining her full power.

Araragi has hunted down the three vampire hunters that defeated Kiss-shot and retrieved her limbs to return her to full strength. However, now that Araragi has almost accomplished what he’s been fighting for this whole time, he has to consider if this is what he really wants. Once he revives this powerful immortal vampire, there is no telling what she might do, and there would be no way of stopping her.

But there is more to the story that Araragi doesn’t understand. If a newborn vampire like him could defeat the hunters, how did they overpower Kiss-shot? Can he trust her to turn him back to a human? And how is that even possible in the first place?

Araragi is at his limit but he must come to a decision, and it may not be possible to resolve this situation without doing something he’ll regret…