Surviving as a Black Magic Experiment Subject

I was reincarnated into the book I had been reading, The Saintess of the Demon Kingdom.

But instead of becoming the main character or even a supporting character, I became an experimental subject for forbidden black magic!

This can’t be happening!

I tried everything I could to survive, but things looked hopeless. Was I really going to die like this?

Just when I was about to give up, I met two men: Einhart Rueas and Kailen Durance, the original male lead and second male lead.

With their help, I managed to escape the laboratory. So far, so good.

But then…

“She does not belong to you, Duke Durance.”

“And she has never given you permission either, Marquis Rueas.”

Wait, what?

Dear original male lead and second male lead, why are you fighting over me instead of the female lead…?

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