Meida

-I want you even if I make an enemy of the whole world-

Strange beings hide among us called "Meida" who can serve as miraculous medicine to humans. Eating a part of them means that your own corresponding body part gets completely restored. A young man wants to use a Meida to save his little sister who's suffering from a deadly heart disease. But then he finds out that his best friend is in fact a Meida. What will he do now?