Ko Ichinomiya's family motto is "Never be indebted to anyone," but after losing his pants and falling into the Arakawa River, he quickly finds himself in debt to his savior, the adorably eccentric Nino who lives under the bridge. To repay her, he promises to help her fulfill her wish to "experience love." Along the way, he'll encounter the river's other inhabitants, including a hot-headed kappa, a drag queen Sister, and a literal rock star.
