Miserable 15 year old boy Sanada Kohei is in the third year of junior high school where he is constantly being bullied by three of his classmates. Along with a troubled school life, Kohei doesn't get very good grades. His family life isn't too great either, with an overprotective and doting mother, a serious and nerdy sister, and a father who doesn't even look at his family. Kohei has already gone through ten tutors by the time that the drama takes place. His newest tutor. Shunsaku, is not the usual kind of tutor; he's a bit perverted and will throw Kohei around and hit him when he's being difficult. Ultimately, it's Shunsaku's influence that changes Kohei.
15-Year-Old's Blues is part of Fuji TV's Division 1 project that specialises in experimental drama as well as giving giving up-and-coming young screenwriters, producers and directors a place to develop their skills and televise their works.