She Was Both Called God, as Well as Satan - Chapter 37 – Birth of “Courier Demons”

A love story that came about due to Fight The Landlord. [1]

Masterpieces such as 'The Divine Comedy', 'The Theory of Evolution', 'Encyclopaedia Britannica', 'The Theory of Relativity'...Born in the history of human civilization, possess mysterious and magical powers in another world!Original sin, biological evolution, mastery of all arts...By reading the secret tomes, one can gain a variety of powers!The only trouble for the people of the other world is that they find it difficult to understand the texts from Earth.At this time, there comes a librarian from Earth...

Damien Crowell was just a regular high school student who took a regular tunnel on his way to school—until one day, that tunnel spit him out into a completely different world. Instead of his usual path, he finds himself in a dark forest that stretches on for days, running on nothing but sheer stubbornness and a tiny water bottle.Just when he thinks he's going to die, he stumbles upon a castle straight out of a fairy tale (or a theme park) and promptly passes out. When he wakes up, he's in a prison cell, surrounded by confusingly handsome men who speak gibberish—until a beautiful, horned beastman with perfect hair and a translator necklace finally lets him understand.Now, trapped in a fantasy world where every guy looks like they stepped out of a modeling agency, Damien’s biggest challenge isn’t just survival—it’s trying to figure out why *he* always looks like a mess in comparison. Can he make it back home, or will he end up staying just to admire all the beautiful faces?Join Damien as he navigates a strange new world, awkward introductions, and a whole lot of unexpected feels in this hilarious, fantasy adventure!

I exist in the darkness, disappear under the bright light, and will eventually devour the sun and turn into the shadow of all things… Known by people as the indescribable terror of darkness; the king of shadows; the dark day; the existence of the shadow of the world , is still just a somewhat special high school student, facing a weird death game…

- Description from novelbuddy