I was Summoned by a Demon Lord (Male Reader x OCs)

Part 1: Welcome to our World

We open to a woman in red and black with horns on her head.

This is Luciel, the newest Demon Lord in Tartarus, the Demon Realm. Unfortunately, she hasn't been doing a good job.

Luciel: What do I do... What do I do...

???: Trouble?

The red haired demon sees a ghostly girl.

Luciel: Hello, Blanc.

The Phantom floats over.

Blanc: What's wrong?

Luciel: I'm trying to come up with a way to do my job better.

The Phantom thinks for a moment.

Blanc: Maybe get a second in command. Someone to help in your decisions?

Luciel: Good idea. Now... A summoning spell... Invoke!

A red magic circle appears in front of the girls as a male with (h/c) hair.

Luciel: It worked!

Boy: Where am I?

Luciel: Tartarus, the Demon Homeland. I'm Luciel, the current Demon Lord.

Blanc: I am Blanc a Phantom that resides here. And you are?

Y/N: Um... Y/N.

Luciel: Well, Y/N, ahem. I summoned you to become my second in command.

She tries to seem commanding but it kinda falls flat.

Y/N: Um...

Blanc: You are in our home territory. And you seem lost.

Luciel: Yes. If you become my second in command, you can be protected from the many monsters that would tear you limb from limb.

You pale a bit.

Y/N: I guess I'll join you.

Luciel: Excellent. Now I'm going to give you some magic.

Her finger glows as she presses it against the back of your hand, creating a dark red mark in the shape of a bat.