In the Apocalypse, Souls Reign Supreme

He is Wu Huo, a fat otaku. She is Shangguan Ming, a young lady from a wealthy family. Yet in this zombie-infested apocalypse, these two very different souls have both possessed the body of Mai Shiranui. What? Who is Mai Shiranui? Don't worry, there are plenty of other game characters you don't know either. After all, one of the male protagonist's special abilities is to permanently transform into... after fusing with someone. Sorry, I just spoiled it.