Hiroko attends the memorial service of her fiancé, Itsuki Fujii, who died in a mountain-climbing incident. Although Itsuki's mother says that their old house is gone, Hiroko records the address listed under his name in his yearbook and sends him a letter. Surprisingly, she receives a reply, and discovers it came from his old classmate, a girl who also happens to be called Itsuki Fujii.

Tomoko Tamura, a second-year high school student living in a detached house in Miyahara-chō, Omiya City, Saitama Prefecture (now Kita Ward, Saitama City), goes on an overnight hot spring trip to Izu with eight of her classmates, four boys and four girls, to enjoy her last summer before their entrance exams. However, Tomoko cleverly gets off at a station along the way to buy some ekiben (boxed lunches), which causes her to miss the train and get separated from her friends. From there, a series of tragedies unfolds in this coming-of-age comedy. Based on the comic by Minako Fujino. Screening alongside the film is That's Cheating! The Biggest Plan in History? (starring Tatsuya Yamaguchi and Namie Amuro, directed by Hiroshi Sugawara) as a double feature theatrical release.

A love story written by an ordinary housewife is going to be broadcast as a radio drama and almost everyone among the crew insists on changing various parts of the play to their liking.