Midori Days

Seiji Sawamura, known as "The Mad Dog" at Sakuradamon High, has a reputation that makes it hard for him to approach girls. He's been rejected 20 times in a row, leading him to jokingly vow to finish high school with his right hand as a girlfriend. However, when he wakes up the next morning, his right hand has transformed into a miniature girl named Midori Kasugano, who reveals she's had a crush on Seiji for three years.