Wikipedia
Kobato
is a manga series by Clamp which premiered in Monthly Sunday Gene-X in January 2005. Seven chapters were released under the title of , but the series was put on hiatus in late 2005. It returned to publication in Newtype magazine's November 2007 Japanese edition; the story has subsequently been restarted at an earlier point in the original timeline. The story features a mysterious young girl, Kobato Hanato, who works in a local kindergarten.
The first volume of the manga was released by Kadokawa Shoten on December 26, 2007, and they have subsequently released the entire series in English.