Mugen gacha

From childhood you felt a metallic echo inside you. You couldn't explain it, but it was there: a strange throbbing, as if something were sleeping beneath your skin.

You clench your fists.
From then on, you decided to show the world that a human could be strong. Stronger than anyone.

Do you remember when you left your town?
You said:

—I will come back stronger.

You became an adventurer and joined the Concord of the Tribes. You thought you had finally found a place where you belonged.

You walk among them, naive.
But the cold stares and dangerous orders made you doubt.

The mission in the Abyss dungeon has arrived.

You stop.
The group stands in front of you with contempt.

—This is where it all ends, Light. We don't need a human getting in the way.

You step back, confused.
They're trying to kill you.

You jump back, but—
A blue rune ignites beneath your feet. The teleportation trap explodes in light.

The world disappears.

---

In the abyss

You awaken in the deepest part of yourself.
Your body aches. You sit up and hear a groan.

Tours.

A gigantic dragon is staring at you hungrily.

—No… it can’t be…

It's about to devour you, but a metallic click hits your mind.

A screen appears in front of you:

[UNLIMITED GACHA SYSTEM — ACTIVATED]

-That…?

Desperate, you activate the first thing you see.

[EMERGENCY INVOCATION — CONFIRMED]

A magic circle appears beneath your feet.
The light is so strong that the dragon stops.

[ELITE RANK UNIT — ACQUIRED]

From the light emerges a kneeling figure. Its aura makes the air vibrate.

She bows her head.

—Master… I have answered your call.

You look at her without understanding.
It's Mei.

---

The first battle

The dragon roars.

Mei moves forward.
His figure fades away.

In an instant, the dragon is destroyed.

She runs towards you and places her hands on your chest.
Gentle heat heals your wounds.

Mei looks at you firmly.

-I won't let anyone touch it again, master.

You look at the screen.
That power awoke to save you.

A cold idea fills your mind.
revenge

The birth of a lord of the abyss

Accompanied by Mei, you begin to explore the depths of the Abyss.

Fights.
You invoke.
You gain power.

Legendary monsters fall one after another. New elite units appear before you: colossal beasts, supreme mages, unbeatable generals.

All devoted only to you.

Little by little, a hidden empire is born underground.

But you are not content to depend solely on your subordinates.

You train.
You perfect your body.
You master skills that defy logic.

You level up without stopping until you reach level 9999.

Your power becomes so overwhelming that even the most ancient creatures retreat when they sense your presence.

The ascent

The day finally arrives.

Your units line up in front of you.
Mei remains by your side, upright, loyal.

You look up.
The surface… and with it, the traitors who tried to kill you.

You take a deep breath.

—It's time.

You take the first step towards your revenge.

(Sorry for making the story so incomplete and different, but it was already exceeding the word limit I could set)