Kids on the Slope, manga by Yuki Kodama, anime by Shinichirou Watanabe/Fuji TV, music by Yoko Kanno
High school freshman Kaoru Nishimi moves to a small town in Kyushu to live with relatives. He meets notorious bad boy Sentarou Kawabuchi and their classmate Ritsuko Megae, whose father owns a record shop with a rehearsal space in the basement.
Kaoru's family insisted he study classical piano. He's a very serious boy, studious and a bit uptight. Sentarou gets into fights and likes playing jazz drums. As the two become friends, Kaoru starts to loosen up (a bit) and learns to play jazz. Much of the story revolves around a budding romance and the trio's daily school life.
Set in 1966, KotS also shows the conflict going on in society. Sentarou's role model, Jun, has gone to Tokyo to study, but he gets involved in a student protest movement. On a smaller scale, the trio's classmate Seiji wants to start a rock band like the Beatles, and he asks Sen to drum for him, which sparks a conflict between Sen and Kaoru.
US-based readers can watch all twelve episodes on Crunchyroll.