在这部荒川爆笑团动画片中,大财团公子哥市之宫行（神谷浩史 配音）自由不知愁滋味，俨然叼着金汤匙出生的金贵少爷，就读于名门学府T大的他即将毕业，未来的人生一片光明，令人欣羡。他铭记市之宫家的家训“不求人，不欠人”，并以此为傲。可是现实的残酷却不得不令他拖欠人情，在开车通过荒川河时，他被几名少年抢走名贵跑车，裤子也被强行扒下挂在桥顶。强逞英雄的阿行爬桥不慎跌落水中，危急时刻被附近的少女小珊（坂本真绫 配音）救助。拖欠了人情的阿行答应作小珊的恋人，他极不情愿地随着这个自称金星人的少女留在荒川河床，并解释了在此生活的一对电波系怪人：河童村长、星星、武士、修女、铁人兄弟等。有趣怪诞的故事就此展开……
本片根据中村光的同名漫画改编。
Kou Ichinomiya is a perfect man with a perfect life: he is handsome, smart, self-sufficient, and the young heir to a grand corporation. One day, he falls into the Arakawa River and nearly drowns, but is saved by a young girl named Nino, who lives in a community under a nearby bridge on the Arakawa. It's the Ichinomiya tradition to never be indebted to anyone and settle all accounts, and now Kou owes Nino a life debt. Her request is that he becomes her lover and lives with her. And so Kou begins a new life as a member of the village under the bridge - a village, he discovers, full of self-deluded and eccentric people. There's the musician who wears a star mask, a male war veteran dressed as a nun and his femme-fatale rival who runs a farm, a hairdresser samurai and many others, all led by a man in a green costume. Still, as time passes Kou begins to truly feel at home at the Arakawa under the bridge.
大桥下的理想乡。新房你輸了。不顾一切地去寻找。You met me at a very strange time in my life.。真实！。喂！我看完了！。荒川电波村。☆Venus&Jesus☆小姗同好会☆。每一集開頭的獨白，三個翻譯版本。要当小白脸也是人家的自由。
