Led Astray, Scammed by the System, and Then I Slept with the Wrong Crown Prince

[Insane Villain * Goofy Trouble-Maker]

[Sweet Transmigration into a Book + 1v1 Romance, Obsessive Possessiveness, Extremely Jealous]

Su Qing is tricked by the System and transmigrates into a novel, only to end up in the wrong man's bed.

She tries to escape, but he pulls her into his arms.

"Su Qing, you can forget about ever escaping me."

"You want to cause trouble, don't you? Go ahead and cause all the trouble you like with me."

And so Su Qing became a bird in his cage.

Everyone knows how much he dotes on her.

That is, until one day, he learns that the man she'd originally wanted to sleep with was the male lead of the original novel.

He goes mad.

"Su Qing, you can only have me."

"I'm far better than he is."

"Even as a dog, he wouldn't be as loyal as me."

What is this? Wasn't he supposed to be an insane villain? How did he turn into a lovesick fool?