The Young Lady Is Trying to Get Herself Killed Again

A modern office drone transmigrates into a book and becomes a vicious female supporting character who dies horribly. After her younger brother turns evil, he forces himself on the heroine, while the original version of her was merely the spark that caused him to turn evil. The transmigrator changes their fate and treats her younger brother well. But all he wants is to lock his older sister away.

Doesn’t my sister want me anymore?

Your sister wants you.

Face-slapping without delay, pure wish fulfillment.