Zhang Wansen plans to confess his love to Lin Beixing, a girl he has had a crush on for a long time after the college entrance examination, but the sudden concert accident turned everything into an irreversible tragedy. Helpless Zhang Wansen unexpectedly restarted this summer, and returned to Lin Beixing before the tragedy. The secret of restarting summer seems to be not as simple as imagined...
| Actor | Role |
|---|---|
 Karlina ZhangLin Beixing | Lin Beixing |
 Qu ChuxiaoZhang Wansen | Zhang Wansen |
 Fu JingGao Ge | Gao Ge |
 Chiang Yun-LinMai Zi | Mai Zi |
 Wei'er LiTeenage Lin Beixing | Teenage Lin Beixing |
 Yu QianqianChild Lin Beixing | Child Lin Beixing |
 Yu YaoTeenage Zhang Wansen | Teenage Zhang Wansen |
 Zhang BoxinChild Zhang Wansen | Child Zhang Wansen |
 Mo ZonglongWorker | Worker |
 Sun TianyuLiu Ga | Liu Ga |
| YYi ZhaoboGao Guangming | Gao Guangming |
 Hou WeitaoLin Dahai | Lin Dahai |
 Roada XuHan Tengteng | Han Tengteng |
 Li DongHouzi | Houzi |
 Tian ZhuangzhuangXe | Xe |