If I Don't Date, I Split into Two Personalities

My name is Su Yuntuan, and I'm the cannon-fodder true heiress in an occult novel.

According to the plot, I have no talent for cultivation, so my mother deliberately switches me at birth with the supremely gifted heroine. Then I grow up relying on the brother who found me in a garbage dump.

Next, my brother is in a car accident and becomes a vegetable. Because my birth characters match the heroine's, I become the tool she uses to prolong her life.

In reality, my eighteen-year-old self knows nothing about any of this. All I remember is that on the day of the car accident, I was frightened unconscious by the three pairs of black wings that suddenly appeared behind my brother.

When I wake up, I'm completely unharmed, but standing before me is an Abyssal Demon King who looks exactly like my brother. He asks gently, "Tuantuan, you're finally awake?"

From then on, my life is filled in turn with an elder brother who's an emotionless sword sovereign, a down-and-out scholar, an imperial marshal, a supreme God of Light...

Even though they're all just different personalities he splits off from himself.

Blurb Two:

My name is Su Yuntuan. I'm an optimistic, beautiful young woman with a tragic past, relying on my brother with multiple personalities.

I thought the rest of my life would be spent earning money for my brother's medical treatment, playing role-playing games with him, and sometimes accepting the bits of broken glass he treasured just to cheer him up.

Until one day, my brother got drunk and took me flying on a sword. That's when I realized he hadn't been lying when he said he was an Immortal Sovereign.

Later, I also discovered he hadn't been lying when he said he was a Demon Emperor, a Demon King, and a Zombie King.

Once I put everything together, I fell silent for a long while, then quietly took the few pieces of broken glass I'd been using to prop up the bed to an appraisal center.

A few days later, several hundred billion appeared in my account.

Optimistic, adorable heroine x jealous, multiple-personality main god male lead

[Important] They are not related by blood! They have different household registers!

Aspiration: Don't be deceived by appearances.