Miyu and Shuya are high school students. They have dated for 2 years. Miyu and Shuya have a promise that no matter what, they will watch a movie together on the first day of each new month. When Miyu and Shuya are on their way to the movie theater, Shuya suddenly cancels their date. Shuya seems like he is hiding something and he acts nervous. Later, Miyu goes to the place where she is supposed to meet Shuya, but she witnesses Shuya getting into a car accident. She panics, but when she wakes up she finds herself on the morning of the accident. Miyu keeps waking up on the day when Shuya got into an accident.
Kerou is a sullen teenager who tries to act as a go-between when her shy friend Yuezhen falls in love with Zhang. Kerou approaches Zhang on her friend's behalf, but the boy likes Kerou instead and doesn't want to hear about Yue Zhen. As Zhang is the popular kid at school - a swimmer with an easy way about him - Kerou thinks she should be happy, but she's not. She is beginning to realize she has feelings for her friend Yue Zhen.
Masaki is about to move to the U.S. with his parents, much to the dismay of five girls who all like him in different ways. Tomboyish Takako always gives him a hard time; Haruna is a childhood friend; Alisa has fancied him since a shopping trip in nearby Shibuya; Naoko is still readjusting after a long spell in the U.K.; and Yumi likes practicing basketball with him at night. All wonder who his "special girl" is, but Masaki isn't saying.
