After Sakura Mizukami shows up at the Kazama household to ask for a favor, Kenji Kazama and his sister Noe end up unwillingly participating in a footrace at the local shrine. Intent on winning the prize—spring water that only appears once per year—Sakura recruited the Kazama siblings to guarantee her victory. But when Sakura's clubmates, Chitose Karasuyama and Roka Shibasaki, enter the race as well, the girls' compet...