Obey Me! One master to K̸I̸L̸L̸ them all!

(Story will be detailed and I take requests on how the story should go)
As the days passed by, you couldn't help but feel a sense of unease in the realm of the devil brothers. Being the only human amidst a sea of demons, you were constantly reminded of your differences. Whispers and hushed conversations followed you wherever you went, as the demons spoke in hushed tones about your inadequacies. The weight of their judgment bore down upon your shoulders, leaving you feeling isolated and out of place.

However, fate had a different plan in store for you. In a twist of events, a horrific accident befell you, resulting in your presumed death. As the darkness engulfed you, an ethereal light pierced through the void, pulling you away from the clutches of mortality. You awoke in a daze, feeling a strange energy coursing through your veins.

To your surprise, you soon discovered that you had been reborn as a demon. The transformation had granted you a newfound sense of power and belonging. Your once human form had been replaced by a more sinister visage, adorned with horns and a tail. As you reveled in the revelation, you yearned to reunite with the devil brothers, eager to share the news of your rebirth.

However, as you ventured through the familiar halls of the demon realm, you couldn't shake off the sense of foreboding that hung in the air. The passage of time had not been kind to your absence, for months had passed since your supposed demise. In your absence, the devil brothers had found a replacement for you, a new human companion to fill the void you left behind.

The pang of betrayal stung deep within your newfound demon heart. The realization that you had been replaced struck you like a dagger, and a mix of anger, sadness, and longing flooded your emotions. How could they replace you so easily? Were your memories and experiences with them so easily forgotten?