Koharu and Hiyori became "sisters" due to their parents' remarriage. As winter fully sets in, one might think fishing is off-season, but they challenge themselves to carp fishing and enjoy the fishing pond, as the anglers remain as active as ever! From the first shrine visit of the year at a shrine near the sea to reuniting with Koharu's middle school friends in her hometown, this volume is packed with events! The girls' story connected by fishing lines, Volume 6!