Monster Girl

Monster Girl (妖怪少女 －モンスガ－) is a manga series by Kazuki Funatsu. It was serialized in Young Jump.

Plot
Part time worker at a general store in Akiba, Yatsuki encounters a beautiful girl named Rokka when she lands on his face in the middle of a park. Much to his surprise, he's able to become friends with this beautiful girl... but she hides a terrible secret that Yatsuki will find out soon enough. With other beautiful girls that surround him, including his little sister Nanao and the maid cafe girl Momo, Yatsuki will have to fight to protect the supernatural girls around him.