Kou Ichinomiya has always lived according to the creed of his wealthy, successful family: never be in debt to anyone. But one day, under the Arakawa Bridge, his life is saved by a homeless girl named Nino. In order to pay her back, Kou promises to be her boyfriend; and thus begins his new life under the bridge.Second part of AKB0048.: In the dry riverbed of Arakawa River, undefeated elite Ichinomiya Kou (aka Rick) met the lovely homeless girl Nino, a self-declared Venusian. Their awkward love stirs up trouble among the other strange inhabitants of the riverbed.