A man falls into a river to escape his family's debt obsession and wakes up more indebted than ever, to a girl living under a bridge who thinks she's a starfish. The joke never stops being funny because the show refuses to explain why any of these people live the way they do. Ko keeps showing up because somewhere between the absurdity and the genuine weirdness of these bridge residents, he stops performing the person his family wanted him to be. The comedy isn't trying to land a punchline every five seconds, it lands because these people are broken in specific ways that make sense only to each other. By the end you realize the real plot was Ko learning that being indebted to people who actually care about you beats being independent and alone.

Ko Ichinomiya, the son of a wealthy businessman, has built his life around one rule: never owe anyone anything. That changes when he falls into the Arakawa River and is rescued by Nino, a stoic, tracksuit-clad homeless girl who lives under the bridge and claims to come from Venus. Bound to repay her, Ko learns that she wants to experience love, and he ends up as her boyfriend. He leaves his comfortable home to live by the river, where the neighbors include a hot-blooded kappa and a nun who is really a man in drag. The result is an offbeat romantic comedy adapted from a seinen gag manga.