Seiji Sawamura is the toughest student in his high school. His grades aren't very good because he fights more than he studies, but he tends to protect the weaker students from bullies. A few classmates idolize him; one (Midori Kasugano from a different school) shyly loves him from afar; but most are just afraid of him, which has made it impossible for him to find a girlfriend—until one morning when he wakes to find a miniature Midori attached to where his right hand used to be.
-taken from wikipedia

Picture	Real Name	Description
	Seiji Sawamura	Seiji is not a true gangster, as he fights to protect the weak using his powerful Devil's Right Hand. Fighting people has a price however: everyone, including girls, fear him. He has gone seventeen years without a girlfriend and wants one badly.
	Midori Kasugano	A 16-year-old-girl who ends up as Seiji's right hand. She has had a crush on him for three years. One day she wishes to be with him so much that she finds herself, in miniature form, in the place of his right hand.