Tsubasa 12. Clamp

Sakura has a mysterious power, a power that no one understands, a power that can change the world. Syaoran is her childhood friend and leader of the archaeological dig that took his father's life. On the day Sakura goes to the dig to declare her love for Syaoran, a mysterious symbol is uncovered that will have vast repercussions for them both. It marks the beginning of a quest that will take Syaoran and his friends through worlds that will be familiar to any clamp fan, as our heroes encounter places and characters from "X", "Chobits", "Magic Knight Rayearth", "xxxHolic" and many more! But all that matters to Syaoran is his goal: saving Sakura. "Tsubasa Reservoir Chronicle" crosses over with Clamps' other hit series, "xxxHolic"!