Midori no Hibi

Seiji Sawamura is infamous at school for his powerful right fist and frightening reputation, but what he secretly wants is far simpler: a girlfriend. After roughly twenty rejections, he wakes one morning to find that his right hand has vanished and been replaced by a tiny living girl named Midori Kasugano. Worse for Seiji, Midori already knows him very well. She has loved him quietly for three years but never found the courage to confess. Now the two literally cannot get away from each other. As they hide Midori's existence and search for a way to restore her body, Seiji begins to know the girl who loved him from afar in a way neither of them ever expected.