Another World Has Been Summoned. The Earth Is in Danger of Extinction Due to the Appearance of Monsters and Dungeons, but I’m Going to Enjoy Sightseeing Without Worrying

As monsters appear all over the world, an unprecedented panic has ensued. Cities and dungeons are intermingled. New skill, level, and status rules. Furthermore, the appearance of aliens from other worlds transformed the entire planet into a lawless zone. I was flying back to Japan on a passenger plane when I noticed a flying dragon. I was able to defeat it after a bloody struggle, but the plane exploded and crashed into the sea. After three days of drifting, I managed to make it to land. I rejoice in the face of an irreversibly altered world. “This is fantastic! This is going to be a lot of fun for me!” The new world was a pleasant surprise. Because the original world was dull, thi...