There's a young couple, Haruka and Kenji. One day, Haruka gets disappointed in Kenji, and runs away with their son, Takuya. They forward to Kenji's friend, Mitsuru's house. Yet, Haruka asks her mother, Kiyoko to take care of Takuya, and starts her job hunting, since she can't get along with Mitsuru. On the other hand, there is another young couple, Takuma and Kana. Even though, they look happily married for two years, Takuma hides a secret from Kana. One day, Takuma's co-worker, Akita comes to Takuma's house. Akita suddenly tells one secret to Kana while Takuma is not around. Shocked Kana attempts to reveal the secret on Takuma's way home.
Working for a textbook publisher, Seiji has lived in Tokyo since his mother moved them there after getting divorced during his childhood while his father remained in the countryside. To open up a new market in the Tohoku area, Seiji goes back to his hometown and meets his father for the first time in 30 years. They start living together with hard feelings and bitterness; however, an encounter with the neighborhood kids makes Seiji open his heart bit by bit, even to his old man. One day Seiji hears about the "Once around the Star Tour" at the elementary school where he is visiting on business. This brings the father and the son close together and draws them back to one memory...
