I Customized the End of the World

Someone who was sleepless at night was searching for indescribable content on the Internet. He clicked on a tempting link with amazing speed. Unexpectedly, he was locked by a mysterious virus and was forced to customize a doomsday package. The corpses that eat human flesh, the sea clan that hunts humans, the people from the center of the earth who seek revenge, the invading extraterrestrial visitors, where should the surviving humans go, and how should the protagonist who caused all this deal with it? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.