I am a princess imprisoned in a tower as a sacrifice.
A little thing called the System told me I was about to die. My imperial brother was going to kill me as an offering to Heaven.
I said, “Oh.”
The System said it could change my future, as long as I first married four men and turned around their destined deaths.
Those four guys seemed to be the four great rulers of the interstellar realm. They sounded so impressive, yet they wouldn't even live as long as I had. Useless.
The System said, “You can't think that way! You have to make them fall in love with you! Save them! Save yourself!”
I said, “Fine. One more question.”
“What question?”
After I marry them, can I also get together with their brothers, ministers, generals, enemies, admirers... all of them? A few of them are really handsome. I can't let them go.
The System fell silent, then asked why I'd been locked up.
I said it was no big deal. The women of our imperial bloodline had a few honorifics among outsiders, which might have scared my imperial brother.
It trembled as it asked what they were.
I thought for a moment, then said:
[My subjects honor me as the Supreme Blood-Soaked, Terrifying Empress. My enemies curse me as the shadow that haunts the throne. Rebels cry my name in their final moments: “Blood Madonna! Black Goat! Wicked Witch! You are the ruler of Hell!”]
The System... the System went mad.
An all-male harem Mary Sue story. The heroine gets everyone.
Theme: Sweet romance.