Vampires

Vampire is a creature that lives during night and sucks human's blood. Human can become a vampire if they fall in love in it and gets their blood sucked.

There're several known vampires in the series as of now:
 * Nazuna Nanakusa
 * Kabura Honda
 * Hatsuka Suzushiro
 * Nico Hirata
 * Seri Kikiyou
 * Midori Kohakobe
 * Kiku Hoshimi
 * Akihito Akiyama
 * LoveGreen
 * School teacher that Anko Uguisu killed (†)
 * Haru Nanakusa (†)