Riina Takahashi is a passionate transfer student whose arrival significantly impacts the high school rowing club in Matsuyama City, Ehime Prefecture.
She enters as the club faces imminent discontinuation, inspiring fellow students—particularly Etsuko Murakami—to take action and revive the team.
This initiative sparks the central narrative of collective effort and perseverance.

As a dedicated team member, Riina engages in rigorous training and competitions, contributing to the group's dynamics throughout their challenges.
Her interactions with peers foster camaraderie and mutual growth, instrumental to the team's journey.
Her presence drives the narrative focus on collective resilience and dedication to rowing.

The Seto Inland Sea setting underscores their rowing activities. Riina's role remains integral to depicting the team's shared journey.