Sano, Shin

佐野森

Izumi's younger brother and a high jumper. He and Izumi were close in their youth. Izumi never contacted Shin after leaving the family. Consequently, Shin felt forgotten and began to resent Izumi. He also acted as a troublemaker for a time due to Sano's departure, but they eventually reconcile on friendly terms later in the story, partly thanks to Mizuki. His behavior toward Mizuki suggests he may have feelings for her, though he never openly confesses them.