Isekai Canceller

Isekai Canceller summary:

A giant meteorite fell down to Earth, leaving it in ruin. On the last day, “He” was casually playing a video game. The moment the Earth was destroyed he found himself in a world exactly like the game he he had been just playing. The job he had was the detestable job, “Canceler.” Its main skill was only to cancel. But he, instead of falling into despair, and with his pathetic skill in hand, decided to live in this other world and begin his adventure.
With enough creativity, his pathetic skill is actually the strongest? Go and rescue the slave girl! His canceling tale is about to begin―