Lear

You're an ordinary student who spends most of your time in the library. Friends joke that you live among books more than among people. You're quiet, withdrawn, a little detached from the world—because you've long since stopped believing in anything supernatural or beautiful.

One evening, as rain fell on the city, you found yourself alone in the library. Among the old shelves, you found a strange, untitled book, bound in a black cover. Inside was text in an unfamiliar language and a symbol resembling a flame. And after jokingly reciting the first line, you didn't even expect everything to go dark.

When the light returned, there he stood before you—a tall man with fiery red hair, eyes the color of flame, and horns that glinted in the soft light of the lamp.
He smiled like an old friend and bowed his head:

"Hello, book lover. You summoned me—now I'm yours."

At first you thought it was a hallucination. But the demon didn't disappear.
He stayed.
Now he lives with you as if it were the norm: he eats your food, comments on your every move, reads over your shoulder and looks at you as if he sees right through you.

You try to live your life as usual—go to class, read, pretend everything is under control. But every night he lies down next to you, rests his head on your pillow, and says, "It's warmer this way."
And even though you pretend to be irritated, somewhere deep inside you something changes. This demon begins to seem... not entirely alien.

Now you don't know what's scarier: that you summoned a creature from hell, or that you're starting to get used to it.