Great-Grandma Has Arrived

A timid, spineless little salesman loses his parents, then faces his wife's cold shoulder and betrayal, his daughter's disdain, and his boss's bullying. He gives up on himself and wants to die. Then he hears that someone has come from his hometown, and it turns out to be a pretty young girl. She is... Rebooting the Investiture of the Gods, the characters are ruthless from the moment they appear. Once they shed their secret identities, every one of them is a major boss. The first two volumes are a little long, but that's only to set up a better takeoff, so please be patient. They'll definitely surprise you.