Rich Sister-In-Law: My Best Friend and I Dressed up as Mortal Enemies

My best friend and I traveled through a wealthy family story together. She became the cold-faced wife of the eldest young master, and I became the seductive bride of the second young master—sister-in-law on the surface, but an ally behind the scenes. We worked together to tear up the script, and ended up tearing it apart, tearing the hearts of the male protagonists out.