Hazakura is one of the first-year Kendo Club members. Sometime toward the end of middle school, his left hand was injured leading to his doctor recommending that he stop kendo. Because in kendo, the majority of the power behind the shinai comes from the left hand, regardless of your handedness. Being a born swordsman, he declined.
One day Hiroto bumped into him and as a result of Sayuri’s taunts, they end up exchanging blows. A few hits in, Hazakura calls it a draw and later on, they have an official match. This time, Sayuri intervenes and Hazakura is awestruck by the power of the Sakura One Strike Style and declares Hiroto his rival. Finally having someone to compete with, both Hazakura and Hiroto join the Ouka High Kendo Club.