Platinum End, Vol. 3 by Tsugumi Ohba
As his classmates celebrate their middle school graduation, troubled Mirai is mired in darkness. But his battle is just beginning when he receives some salvation from above in the form of an angel. Now Mirai is pitted against 12 other chosen humans with the winner becoming the next god of the world. Mirai may have an angel in his corner, but he may need to become a devil to survive. With the tragic events at the baseball stadium behind them, Mirai and Saki plan their next move. But can they trust a new god candidate who asks to join their side? And when the god candidate disguised as Metropoliman launches his next attack, Mirai will have to make a difficult choice!