-Sora-

is a japanese 4-koma manga series written by Shirayuki Shion. It began serialisation in the April 2007 issue of Manga Time Kirara.

The series was released under 2 volumes from July 2008 to May 2009.

Synopsis
Sora has become a longing flying postman. She wants to become a full-fledged person as soon as possible, but the friends she meets are too natural, too tsundere, and troubles every day, isn't it? A lot of fun encounters and cuteness of Dojikko who works hard!