Two kids meet near a floodgate after school. Yu is a shy 17 year old girl who sits down next to Yosuke as he plays his guitar. Yosuke recently gave up playing sports and has devoted himself to playing the guitar. He only plays a few lines over and over, as he tries to make a song from what he feels. Their relationship progresses tentatively as they both have difficulty in expressing their feelings and thoughts. One day Yu takes the initiative and kisses Yosuke. Yosuke responds by picking up his guitar and going home. Years later Yu wonders, "Why did I cry? Why didn't I stop crying? Why?"..while Yosuke wonders "Why did I run away from you that time?" Fast forward seventeen years later. They haven’t seen each since their days in high school and now have moved on with their separate and empty lives. That is until one day they randomly meet during an audition. They agree to go out together after work for drinks. As the evening turns into the early morning, they are still awake sharing memories of their high school days. After 17 years Yosuke finally kisses Yu. Yu starts to cry again and they soon go to visit her older sister. The next day Yosuke decides to call Yu and make good on a promise he made to her 17 years ago, that is he would play her his song when it is completed. Yu agrees to meet him again and Yosuke goes home to get his acoustic guitar. While on his way to meet Yu, fate deals a strange twist to their plans, perhaps this will be the moment where they can finally say “Sukida.”
Ryo is a former professional boxer who becomes a collector for a loan shark. He grew up in an orphanage in Okinawa Prefecture with heroine Haru, Natsumi, an aspiring actress, and two others. One of them is now a lawyer who has had to bail Ryo out and the other a lucky young woman adopted by a rich family. Haru, too, was adopted and has never once left the island where she grew up. When her adopted mother dies, she decides to go to Tokyo to find the old group. Being naive to the ways of the modern urban world, she almost ends up being sold off into the sex industry as soon as she sets foot on Tokyo's fair shores, but Ryo comes to her rescue
Rainbow Song is a beautiful, yet tragic love story about a romance that never happened. Two young film students, Tomoya and Aoi, become fast friends after being put on a project together. Quickly, Tomoya becomes enamoured with the young girl but is too afraid to tell her his true feelings. After graduation, Tomoya continues living in Japan working on a film set and Aoi leaves to work in America. The movie takes a turn as Tomoya finds out that Aoi never made it to her destination because of a plane crash. He then starts to become consumed with his thoughts, day-dreaming about the love affair that never was nor can be
