In this other world, people can only keep his memory for three months. Once the time limit is up, as long as they can't see him within three hours, they will forget him completely. This is a curse, and the only people who are allowed to keep their memories of him want to hunt him to the ends of the earth. Maybe he shouldn't have extravagant hopes for this other world in the first place. Yes, this is the world's deep malice towards him.