The journey of Arusai

This is the story of a young man who died, losing everything he had while protecting someone. But instead of having eternal rest, his soul was kidnapped by a god for a competition in the world they controlled. There was a big problem when he obtained his new body, which made it very difficult for him to survive in this world, which was filled with both magic and creatures, both fantastic and nightmarish. However, there was something that severed his connection to the god and the competition, but he still had a long journey ahead of him.