To The Abandoned Sacred Beasts

Katsute Kami Datta Kemono-tachi e (かつて神だった獣たちへ lit. To The Abandoned Sacred Beasts) is an ongoing manga by Maybe. The series is serialized in Bessatsu Shōnen Magazine.

Plot
In war, men become beasts. War makes gods out of beasts. When war ends... where do the gods go? Where can they rest their weary heads?

Wolves walk the forest of despair, the wasteland of lamentation, the sea of bitterness, in the time of dark and light. To kill those that were once their friends.

Official

 * http://www.shonenmagazine.com/bmaga/katsukami The manga's page on ''Weekly Shōnen Magazine's website