Bokurano (ぼくらの, Bokurano? lit. Ours) is a manga by Mohiro Kitoh, serialized monthly in Japan in Ikki since 2003; currently 9 tankōbon have been published by Shogakukan. The manga also spawned an anime series directed by Hiroyuki Morita and produced by Gonzo which aired in 2007, and a light novel named Bokurano～alternative～ (ぼくらの～alternative～, Bokurano～alternative～?) is currently in production featuring an alternate story by Renji Ohki and character designs by Kitoh himself.

Source: Wikipedia