It's a simple job, getting your blood sucked by Kaya Kiryuuin. Or...is it?

"Hey, you said you wanted a sister, right?" First year highschool student, Toujo Basara, was suddenly asked by his father and fell into a state of panic. On top of that, the eccentric father told him he wil...

High school student, Kisaragi Takeru who had gained special physical abilities from the accident of his past, lives in a modern society without changing much though uncomfortable. However one day, a mysteri...