Witness the touching relationship between young vampiress Misaki and her human companion, the former vampire hunter turned investigative author, Kurose Kuroe, whom she'd die to protect. For recently turned vampire Minato Misaki, vampirism and the beastly powers that come with it are something that she wouldn't wish upon her worst enemy, let alone her beloved Kuroe. But Kuroe's supernatural investigations make him a regular target of not only vampires but of all sorts of undead creatures of the night. The only way to save him from these deadly threats may be to do the one thing that Misaki fears the most: to turn Kuroe into a vampire for his own protection
(Source: Seven Seas)

Naruyuki Touya, young student, arrives at Amagiri Gakuen, his new highschool. He finds himself on the quay of the station faced to a robot out of control and is attacked by a girl and then a classmate.
Who are they? How come the girl knows his father?
And what is the connection with him and this highschool?
From Sazan Quest

In a ruined city, Takeru comes across a suicidal young girl named Konoha. She's deathless, and she's being used as a guinea pig by a cruel organization. Seeing no meaning to her life, she fled her captors to seek a way to end it. Takeru has a lot in common with Konoha-- he's also deathless. He's made a life for himself, though, locating people by contract. After he rescues her from her pursuers, he convinces her to continue living. Maybe she'll be able to find a purpose, as she and Takeru face the future together.

(Source: MangaHelpers)

Reboot of the original Cronos Haze manga.

Amagiri Academy—a school that takes up the entirety of a single island.

Touya only has a vague recollection of his father and enrolls in this school that he attended in order to learn what became of him. But soon after school begins, Touya is dragged into one mysterious and troublesome affair after another...!

(Source: Crunchyroll)