Adamant Doom

It was supposed to be a dull rival villainess reincarnation story, seeing that nobody died and the world's fate was not at stake.

I, as the villainess, planned to just let the Heroine get whoever man she want and go on about my life. My heart won't be broken if I never befriended any of the capture target. I won't fall in love if I avoided them except for unavoidable events, fixed from the dating game's story. When all was said and done, I would return to my daily life and the others to theirs. Then the plot could be ended up with nobody getting hurt.

Yet—

The 'game' hasn't ended.

It was merely a lighthearted initiation of something bigger. At least that's what she said.

Furthermore, this 'something bigger' has the world's at stake, and everybody possibly will die.