The Timekeepers

This is a dream future, where time travel can be done, even going back to the past is not difficult. The Time Keeper Division is created all over the world. When a major case cannot be resolved by the local police, the case will be handed over to them. With a note that whoever Timekeeper who goes to the future or the past, can't change anything, can't say anything, can't desire anything, and they have been sworn in with 7 oaths of allegiance. In the Superpower County that stands on reclaimed land, Karsa, there is a team in the Time Keeper Division that is very well known. They had never failed in any class mission. One day, the elite team got a leave after working for a long time. Going back and forth from the past to the future exhausted them. Who would have thought that they would get a surprising mission in the middle of the vacation? Not to mention, it was an F class mission! They get a sudden mission to investigate who has saved an orphaned girl from an assassination attempt a few days ago. Who would have thought that in order to carry out this F-class mission, they would have to be trapped in a parallel world with the exact same reality as in the world they know, but on the other hand, they don't know at all. All the humans in that world... are after them?! A trivial mission that initially only asked them to transcribe and record history, instead turned into a mission full of mystery and required them to be able to survive in a world that was falling apart. UPDATE DAILY