Rixiang Kuihai (miwa) and Hasegawa (Kentaro Sakaguchi) are childhood friends, and they form a band with their friends Naoka Matsuda (long Xingliang) and Tetae Nakamura (Yuki Quanze). Naoka has always been silently in love with Kuihai, and he decided to express his feelings at the summer festival. However, Kuihai's eyes have been following the arrogant and isolated Lu, in his tenderness and indifference, Kuihai can not determine what kind of position he exists in his heart. On the day of the summer festival, the band performed on the stage, and the absent-minded Kuihai died in a traffic accident after screwing up the whole performance. However, when she opened her eyes again and found that she had gone back to a week ago, this incredible experience enabled her to discover the secret that Lu had been hiding, and the relationship between the two men developed by leaps and bounds. However, no matter how hard he tries, Kuihai will eventually die on the evening of the summer festival, and Lu travels through time and space again and again in order to keep his loved one by his side.