Kai duan

University student Li Shi Qing (Zhao Jin Mai) and video game designer Xiao He Yun (Bai Jing Ting) both fall asleep on Bus 45. When they wake up, the bus explodes after a few minutes. When they wake up again in the same setting, they figure out they are in a loop and can only exit out of it after they are able to stop the disaster from happening. So at each iteration of the loop, they try to do that and also find out what caused it to happen.

This is one of a few cdramas I've watched that are not draggy. Kudos to the writing and direction for keeping the pace and suspense in tiptop order. The ending is worth all the effort the leads went through to save the bus.