When I woke up I was not in my world anymore; I came to another world ; I was hit by truck and when I woke up I was not in my world anymore.

I was in the world where the earth was destroyed by the beast and humanity was in the brink of extinction, and then I was surviving in the shelter, there we could access a lot of knowledge, but I could not do anything, I just had to be in the base and do nothing day throughout. Then when I was in base I had contacted a fox spirit, and it was an f rank; I am a man without a talent and could only contact f- beast. I was really useless and there were many methods to evolve a bf rank beast into s rank beast, but there were no resource.

Then after sleeping, I woke up in the same world but in earlier period where there was a lot of resource but no knowledge and people without spirit seed one could not contact a spirit beast, so I could use my future knowledge to change the world.