Doomsday: It's Broken, I'm a Second-Tier Summoner

It was as if God had rolled the dice wrong, and mankind had encountered the most serious crisis in history... Everything stemmed from that damn meteor shower. At first, it was just a flash of abnormally high temperature weather, but the ensuing unknown plague epidemic and food war caused by soil changes heralded the official beginning of this crisis. But everyone initially thought that it was just an ordinary local hot war. After the redistribution of interests under the leadership of the two restrained superpowers, this conflict will definitely not develop into a thermonuclear war. They will eventually survive. The mutated humpback whale that landed in Seto, carrying the surrounding alien fish and devouring humans wantonly, broke all perceptions... The originally peaceful animals showed amazing bloodthirst, young twigs can grow into towering trees in just a few weeks, and even the most docile yeast showed aggression. Only then did people realize that times had changed. Then, an otaku who only knows how to play second-hand games came into this world. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.