The City of the Mutated World

The originally peaceful and harmonious world experienced an irreversible situation one day after experiencing changes in the outside world. Those "monsters" that only existed in fiction and illusions appeared one after another in people's field of vision. Gods, demons, monsters, dragons, countless creatures that should not exist in this world have appeared in this world one after another. The only thing that can be done, besides sending them back to their own world, is to kill them. "Killing them? It's so easy to say, but it's a pity that I don't have the ability. The most I can do is seal them. WDNMD just throws this miserable job to me and doesn't give me a subsidy. What? Is there workers' compensation? And death insurance? That's okay! I'll take this job!" That's it, the protagonist is not a person from this world, but an "outsider", a human being, but not a human being from this world. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.