haibane_renmei

A 2002 13-episode anime based on Abe Yoshitoshi's "doujinshi.":http://www.doujinshi.org/search/simple/?T=objects&sn=%E3%82%AA%E3%83%BC%E3%83%AB%E3%83%89%E3%83%9B%E3%83%BC%E3%83%A0%E3%81%AE%E7%81%B0%E7%BE%BD%E9%81%94 The storyline revolves around a group of angel-like beings called Haibane, who live in a walled city which no one is allowed to enter or leave.