In the game Mortal Tower, the Aldoria City became well known for having a extremely complex and challenging underground, that was only discovered after the 40th floor Boss was defeated. Also, if Kaito is in the time equivalent to the beginning of Mortal Tower, in Aldoria there may still be someone in particular with whom Kaito has done a lot of business, a character who never cared about the fact that he is a vampire, but if that man is fine and recognizes Kaito, it means that Kaito is at the exact point or just before meeting the Hero who defeated him on the last floor, and the same applies if the underground of the city is already open.
However, if the underground is closed and the man does not recognize Kaito, it means that he is in the timeline equivalent to the beginning and that would be crucial to become as strong as his avatar once was.