yaoi Manga title plz!!

so it's about this yaoi/shounen ai manga where the main character just wanders around, but then he comes to this restaurant where he sees 2 people fighting (one of them was the 2nd main character and the other one was just a minor character). so he like defeats the 'bad guy'. the 2nd main character was astounded at the main characters power becuz the minor character was fighting using some kind of supernatural power or some sort. But then the 2nd main character didn't pay for his meal yet, so the main character asked him if he could work at the restaurant to help the 2nd main character pay off his bill. so the owner agreed. but then somehow they ended traveling together in the story. I think it was a historic manga which was written in chinese (i think)....PLZ SOMEONE~~