To begin with english is not my main language so sorry in advance for the following misspellings thanks for reading

The concept of this idea is a bit complicated because you must know in depth the events before the arrival of subaru

The concept is that satella cannot control the checkpoints

What I want to say is that subaru would be traveling to the past and the present in a random way

Subaru going back 3 minutes in the past or days and even years in the past by altering the time line

Also after a certain period of time subaru will return to the same day he was summoned and seeing the consequences of his actions

If you have come this far, I appreciate that you have taken your time to read this.

You can use and modify this idea to your liking

without more I say goodbye