Sadness. A feeling not too unfamiliar with Japanese High School student named Yamashita Juro. Living life as a poor student with nine younger siblings isn't exactly the easiest thing. Especially when you've got so many things going on in your life. One day, Yamashita finds a girl who forgot her Handkerchief in a classroom. For some odd reason, Yamashita is determined to find this mystery girl and return the handkerchief to its owner. He may also uncover some secrets about himself and others on the way...