When Sakura Mizukami arrives at the Kazama residence to request a favor, Kenji Kazama and his sister Noe find themselves reluctantly entered into a footrace at the local shrine. Determined to secure the prize—spring water that emerges only once a year—Sakura had enlisted the Kazama siblings to ensure her victory. However, with Sakura's clubmates, Chitose Karasuyama and Roka Shibasaki, also joining the race, the girls' competitive spirits are ignited, and the event quickly escalates into a fierce contest with no clear winner in sight. Furthermore, Noe, exhausted by Sakura's relentless teasing, has no desire to assist her, causing the conflict to intensify not just on the track, but among the fractured team members.