I bought this 6 dvd set that includes all twenty-six episodes of the first season the `Tsubasa Reservoir Chronicle' anime a while back but - as ever - have only just gotten around to opening it!
The series follows Sakura and Syaoran as they search for Sakura's memories which have been scattered across numerous parallel worlds in the form of feathers. Joining them on their journey are the warrior Kurogane, the mage Fai, or Fye, together with magical ball of fluff Mokona.
Clamp fans will recognize Syaoran and Sakura from Cardcaptors (Disc three has the story of their childhood past) and indeed some might suggest this is a more shonen take on that story but whilst there is some truth in it this goes deeper into the characters.
Here's a nice picture with Fai, Kurogane, Syaroan and Sakura from this CLAMP series