The Door of Tomorrow is the 53rd chapter of Tsubasa: Reservoir Chronicles
Syaoran appears to be in some sort of dream from his childhood. He has a bandage over his left eye. He then wakes up to see Sakura worried about him and reassures her that everything is alright.
Syaoran remarks that even if he has no past, ever since Fujitaka-san gave him a name, ever since the day he met Sakura, that's why he is "Syaoran". He finally comes to his sense and realizes that they have landed in a new country. This country is called Shara.
Suddenly a group of girls starts rushing toward Syaoran suprized to see that he is awake. He and Sakura then start to notice that Fai and Kurogane are not with them. Mokona tells them that it seems that they landed in a different place. The interesting thing is that they can still understand each other so they cannot be that far away.
Then Suzuran, the owner of the Yuuka district, comes in and yells at the girls for slacking off work and telling them that men are prohibited. She interrogates Syaoran and Sakura. Syaoran tells her and the others that they are travelers. The leader of the Yuuka district troupe explains to Suzuran that Syaoran and Sakura were collapsed in front of their building. Suzuran welcomes them both with open arms because ignoring them would be a disgrace to their troupe's name.
Back to Kurogane and Fai. (to be continued)