A year has passed since his girlfriend, Momoko Kanzaki, left for America. Ryosuke Imai has been waiting for her, but he hasn't heard from her since. In addition to Ryosuke, there's Osawa Teikuro, who's sulking after being dumped by his beloved, and Takagi Toshiyuki, who hasn't been able to marry despite 15 arranged marriages. These men are over 30 and still undecided about their lives. Meanwhile, Okinaka Miki, who runs a fishing boat business, is a straightforward, big sister type. Her friends Hikaru Koizumi and Kazue Shimamura always rely on her. Ryosuke and his friends end up going on a triple date with Miki and the others. Despite meeting new women, Ryosuke continues to cherish his memories of Momoko. One autumn night, Ryosuke boards the last ferry from Kawasaki Port to Kisarazu, where he reunites with Momoko, who was supposed to be in America. However, Momoko has a new boyfriend, Yokoyama Ken, sitting next to her...