Syaoran had known of Kurogane's curse all along, or at least, that was what Yuuko told them. He had known the truth about Kurogane, too. He had known everything and yet he had never said a word, silently taking the princess's rejection and the ninja's hatred. Upon discovering that the boy was not in fact dead but just split between body and spirit, Kurogane declared he had a wish to go and bring him back. He offered the use of all his limbs as payment for his wish. Fai could not help but punch the man in the head. Hard.
Syaoran was their friend too and he sure as hell wanted to go save the boy so there was no way in he would let the ninja waltz alone to wherever the boy was now and bring him back. Sakura, too, expressed her desire to get him back because it was her fault he was in that situation in the first place. Sakura had seen the future in a dream and she had seen him getting stabbed by Kurogane. She had been trying to change the future and redirect the attack to herself, but she had failed at saving him.
All the color drained from Kurogane's face when Yuuko told them where Syaoran's body was- which was what they had to get first. The place where his body was being held was 'The Shrine of Suwa'.
Kurogane made a wish to go back to his home world the next time Mokona jumped and Yuuko told him that the price for a wish like that would mean he had to pick up his father's sword and lose control. He seemed almost scared of the price for a fraction of a second and Fai had half a mind to offer sharing the price before the ninja agreed to the witch's terms. It would seem they were all going to Nihon.
A/N: So as the reviewers have guessed last chapter, Syaoran's body did not end up in Celes after all. Any thoughts on what awaits the gang in Nihon?