Street fighter and befriends Elle while she goes out to buy music when she meets him for the first time he calls her quotChoppyquot which confuses her. During that time he gets jumped by a couple of men but Elle ends up finding that he beats all of them. He then later joins her grandfathers gym and trains so that one day he can defeat Ruo. Later on in Volume 1 Elle founds out he had a dog name Choppy. He also gives her her first kiss. In Volume 2 Kazuki asks Elle on a date but it backfires as a small accident happens and Elle burns herself.