Tsubasa RESERVoir CHRoNiCLE

The next world appears to be uninhabited, but evidence suggests otherwise. While camping out, Mokona has trouble deciding who to sleep with. Mokona is lonely and converses with Yūko.Syaoran, Sakura, Fay and Kurogane wake up the next morning to discover they have become shorter than Mokona. Cerberus finds Mokona and explains that all humans have shrunk in the Country of Kero.