Arakawa Under the Bridge

The protagonist, Riku Ichinomiya, is the son of a corporate president and is always prepared to inherit the family's world-leading business. Since childhood, his father has taught him the principle of "owing no one and asking no one for anything," and he strictly adheres to this family motto in his daily life. However, after nearly drowning in an accident, Riku is rescued by Nino, who lives under the Arakawa Bridge fishing. This leaves him indebted to her for saving his life. In return, Nino asks Riku to fall in love with her and stay together forever. Bound by his family motto, Riku agrees and begins living under the bridge. But the area around the Arakawa River proves far stranger than Riku imagined, as most of its residents are people society labels as "denpa-zoku"—those deemed eccentric due to their wild fantasies...