A Person Becomes a Demon King in Tokyo and Starts Killing Without Restraint

In 2046, there was a global catastrophe and a strange recovery. Monsters became rampant overnight, and all creatures mutated. Huge sharks grew legs and landed, octopuses evolved steel claws, and piranhas came ashore in droves to feed on humans... Pet cats and dogs turn into rampaging beasts and hunt everywhere. Spider ants evolve into beast-eared nymphs and feed on humans... There are endless frog demons, mouse demons, mecha monkeys, hellfire gorillas... Human beings are no exception and have begun to mutate and evolve. The cause was that Akita Country dumped nuclear wastewater into the sea more than 30 years ago, which caused marine life to mutate and invade land on a large scale. The whole world suffers! Tokyo. Rong Chengye, a tourist from the Dragon Kingdom, said that he was reborn again the day before the disaster. However, with his previous life experience, he finally understood the rules of the new world order. As long as he kept killing, he could become infinitely stronger. This has become a world of the weak and the strong. So this time, he was fully prepared. Beginning in Tokyo, when the Demon King... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.