After Being Adopted by an Icy Big Shot Omega

[Third-person narration!]

[Brooding, stubborn puppy-like younger sister x controlling, sadistic, cold older sister, Alpha x Omega, equally matched, devoted to each other, happy ending]

Originally titled Don't Be Your Sister's Dog. The title didn't meet JJ's requirements, so I changed it. The story is unchanged!

My sister raised me like a dog.

So she deserves to know what it feels like to be bitten by one.

*

My sister is the perfect head of the family in everyone's eyes: a noble Alpha marquess, aloof, accomplished, capable, socially adept, and always poised and impeccable in her conduct.

But only I know she's a pervert, too.

Ever since her family adopted me, she has controlled everything I do, from choosing my school and major to deciding where I go and who I befriend. If I disobey her, the thick whip hanging in her study comes down on my back, lashing me until my flesh is a bloody mess.

She treats me like a dog, summoning me whenever she pleases. Everything concerning me has to be approved by my owner.

I hate her. I worked hard to get into the best military academy and become its top freshman. I want to get away from her.

When the school announced that Alpha volunteers could sign up for the Empire's most prestigious military competition, I submitted my application.

But my sister intercepted the report. Once again, she used her status as head of the family to overrule me and locked me up at home.

On the deadline day, my terminal kept ringing, but she snatched it away and told me not to even think about it.

Her bright red high heels pressed into my face. Blood streamed down, mixing with the red of her lipstick. Her exquisite face was still as cold as ice, just as it had looked every time I knelt before her in my memories.

Once, she had been so cold and imposing, like an invincible god.

Then I suddenly realized I was taller than her now.

We fought, and our pheromones burst out violently, filling the entire room. Thanks to my height advantage, I beat her and kicked her hard.

She lost her balance and fell to the floor, her face flushed as a dizzyingly sweet scent filled the air.

1. Her Alpha identity is a disguise. She is an Omega whose glands did not develop properly.

2. My pheromones triggered her heat.

3. Her family adopted me to prepare healthy Alpha glands for her, so she could undergo gender reassignment surgery.

And if nothing unexpected happened, I would die on the night she completed the surgery.

Notes:

The female Alpha has no cheat abilities.

The younger sister is not on her older sister's household register, so there is no incest.

Also includes a small amount of futuristic mecha content and a career-growth arc for the younger sister.

Theme: Where there is oppression, there will be resistance.