Kids on the Slope (Japanese:坂道のアポロン Sakamichi no Apollon)is a japanese manga series by Yuki Kodama. It was published by Shogakukan. The manga has 9 volumes and one extra volume.
The beginning of summer, 1966; because of his father's job situation, freshman high school student Kaoru Nishimi moves by himself from Yokosuka to Sasebo in Kyushu to live with relatives. Until then, Kaoru was an honor roll student who tended to keep to himself, but meeting notorious "bad boy" Sentaro Kawabuchi starts to change him. Through his devil-may-care classmate, Kaoru learns how much fun it is to play jazz and finds the first person he can call a real friend.