The manga goes by default if you want the complete story. In the anime there is no appearance of the characters from Tsubasa Reservoir Chronicles and they play a major role in the story. And of course, I also recommend you Tsubasa Reservoir Chronicles, the manga.
Buying resources out of their own pockets, spending energy and effort, with almost no return so that everyone can enjoy the cultural and entertainment products of developed countries at almost zero cost walking in the dark to serve the light, they are real heroes