Read till chapter 23
There really isn't too much to comment here. Its good if a bit predictable.
The MC is a reincarnated individual but so are multiple people in his generation.
In the previous timeline it seems the empress had a crush on the MC for being the sword immortal and being handsome, so in this life she still has a crush on him despite him not being the sword immortal (to her knowledge)
And then as the synopsis explains, he decides to simply marry her for real in order to change the future events for the sake of the public.
The current emperor who is one of the main drivers of the conflict got into power and is wary of the MC's family for holding too much power and the MC's family doesn't quite want to rebel (as of yet).
one of the 'quirks' that it seems to be intent on keeping is that the MC, and the girl are both unaware that the other is a regressor and is infact strong. They do know that the other is acting but not that the other has already reached basically peak cultivation.
maybe the same way its handled in the other manga "My wife is the empress" it'll be eventually revealed after the end of the first 'season' but we'll have to see.
The MC does seem intent on going to any lengths to keep his family safe so theres that.
Oh btw the art is pretty good.
TLDR, its alright tho nothing too unique and the plot is predictable, but the art is good and it delivers what it says it does and in a fairly entertaining way.
so 9 out of 10.
Will be reading it maybe every couple months