After Kaoru witnesses Sentaro playing the drums one day, the sounds of jazz keep echoing in his head. Shortly afterwards, a visitor comes to the record shop run by the father of Ritsuko, a classmate of Kaoru's. Sentaro chats with Junichi Katsuragi, whom he affectionately calls "Brother Jun", and then the two launch into an impromptu session in the basement studio. Kaoru can't conceal his excitement at seeing a live jazz session for the first time ever. (thetvdb.com)