I saw that the author stopped the WN from April, I hope he/she's doing okay.
Back to the main point, this story is so addictive that I re-read it multiple times. It has enough wholesomeness and character development for each characters.
Kaido being the reincarnated person but he completely became a father for the kids, loving them more than their whole relative lineage did in few hundred years.
The girls went from being cautious to completely depend on Kaito and also loving him more than anyone else. Each year is a different story and different developments, making each year seems like a whole new story worth reading. Everyone having their own problems and they solve them together as a family. Every single one of them changed the fate of the whole family, making a new path happier than any playthrough of the game combined, even with the main protagonist of the game.
I can read it many times without getting bored, and I hope that the author continues with this work. I don't care if it takes 5 volumes (5 years) for them to reach high school, I even love it if the author keeps writing like that. Of course the author's personal life is still the most important. I hope we can continue to read this masterpiece of a novel. With this writing, I doubt the author need to change anything in the LN, because this WN is already the best.