I Was Transported into an Otome Game and Stole the Fated Heroine's Chance

When a professional game grinder transmigrates into the world of an otome game,

And someone steals the fate of the otome world’s destined heroine,

What the heck? Isn’t this a magical world? Why are there mechs from a more advanced era?

Forget that for now. The original plot requires the destined heroine to discover the power of love and defeat the final boss!

But can this world still be saved?