A bookseller from Seoul travels with a young woman to Fukuoka in Japan to meet a former friend from university. While their reunion is haunted by the conflicts of the past, his travel companion floats through the plot as if moving through a dream.

After six months of appearances and marketing, it is clear: Yuka can join the new idol band “Oh! So-le-mi-o! “Will be the lead singer. Too bad she can't sing really well. On a tip from her band colleague Rina, she is sent to the singing teacher Miho for intensive vocal training. Yuka's training begins in a mountain hut above Kobe. But Miho quickly doubts whether her student is really serious about her desire to become an idol. And she's not a teacher to piss off lightly ...

“Sakura no Ame” is a song viewed more than 4.2 million times in “niconico” video sharing website in Japan. After the release of the song by Vocaloid-virtual-idle Hatsune Miku, this heart touching song became a standard for graduations and now it has become a live-action movie. The story is based on a best seller novel “Sakura no Ame” (PHP Institute, February 2012) which 200 thousand copies are printed and was inspired by the song itself. Many characters such as teachers and students seen in the story are inspired by the song sung by a 16 year-old high school student, Vocaloid, Hatsune Miku.