Set 10 years after "Kids Return." Shinji and Masaru have graduated from high school with different paths in their lives. Shinji attempted to become boxer and Masaru a yakuza. They both tried to rise to the top of their respective fields.

After Satoru Watarai graduated from elementary school, he dropped out of school and decided to live within his apartment complex, never to venture outside. Satoru Watari then meets his old friends as they are coming back from their middle school classes. Satoru has now gotten a job at a cake shop within the apartment complex and eventually gets engaged to one of his friends. Satoru, still lives within the apartment complex only, but, as time passes, more of his friends leave ..

Former college buddies Horaguchi and Okawa suddenly reunite on a whim after 15 years apart and try to resume their friendship by planning a trip together. Meanwhile, Okawa’s live-in girlfriend Kaede and the pair's old friend Kyoko get roped into joining them. Soon, the four head off on a trip together with the goal of sharing sukiyaki by the sea.