Rental Hearts

Amamiya Nonoka is a human that can see spirits. Because of the strange ability she posseses, she has no friends at school at all. Suddenly, one day two handsome brothers appear in front of the lonely Nonoka. Aki and Kou, the two of them came to borrow Nonoka's "strange ability"? Not to mention, they are renting parts of their bodies to continue living...

(Source: Starry Heaven)