Shinomonogatari

Volume 1:
"All I ever see in thee is the visage of death."
Shinobu Oshino and Koyomi Araragi set off to meet Deathtopia Virtuoso Suicide-Master in her homeland, the tentatively named Kingdom of Acerola. As the humans fall into a state of disorder, the vampires are being wiped out by a virus that only infects aberrations?
This is the modern era of oddities, oddities, and more oddities!
Youth is by your side, alive and well.

Volume 2:
"Good night, sleep tight, and sweet dreams."
As a specialist in training, Nadeko Sengoku heads to Iriomote Island with Yotsugi Ononoki and Deishuu Kaiki. Their target is the snake charmer Uroko Around— the root of all evil, and the biological daughter of Izuko Gaen. What will be the outcome of Nadeko's deathmatch?
This is the modern era of oddities, oddities, and more oddities!
Thank you, youth. Until we meet again.

(Source: Kodansha, translated)