WOUAAHH, this manga, I thought he was old or something, but it is always essential, it is intense, the protagonists are touching relationships (especially shaolan and sakura) and very funny (with Kurogane).
In addition, to better enjoy this manga or rather the story, read xxx holic who gets a little history tsubasa.
Say they have managed to make tsubasa and xxx holic, two excellent manga (for me), it's geniuses