Little Brother Villain, Drop the Act

A seemingly sweet younger brother who's a maniac inside × an older sister forced by the System to act like a villain, but who's actually a coward

Su Yao transmigrates into the body of a villainess, and the System orders her to make the male lead hate her to the core.

Looking at the handsome young man in front of her, who sweetly calls her "sister," Su Yao thinks the task will be easy.

She splashes coffee on him, and he says softly, "Don't be angry, sis."

She destroys the work he poured his heart into, and he stays up all night redoing it. "As long as you like it, sis."

She humiliates him in public, but he grabs the hem of her clothes with reddened eyes. "Sis, I'll be even more obedient..."

With his hatred level stubbornly refusing to rise, Su Yao is about to cry from frustration.

Then one day, the System announces that the mission has failed, and the punishment begins.

As she is about to disappear, the seemingly gentle boy holds her tight in his arms, wipes away her tears, and gazes at her with utter madness in his eyes.

"Can't keep up the act anymore, sis?"

"Now that you've tempted me, don't even think about escaping me for the rest of your life."

Only then does Su Yao realize that while she thought she was raising a well-behaved puppy, she'd actually been spotted by an apex predator long ago.