You’ve Got The Wrong House, Villain - Chapter 34

Bai Aoxue, the best mercenary in the 21st century, is accidentally sent back to the Chengxi Dynasty in Great Continent due to an explosion in her mission, and trapped in the first daughter of Prime Minister. After her rebirth, she is set up by her father to marry the 5th prince Jun Yeyan who wears a mask all day long.
In the face of bloodthirsty enemies, discord between brothers, collusion among courtiers and invasion of enemy state, can Bai and Jun resolve the crises? What will happen to their political marriage? How will the fierce battle for the throne end?
With many twists and turns, the book brings you to experience palace revolution, love and hatred thousands of years ago.

- Description from Novelupdates

My crew? Yeah... it's a little special.First Division: Night Raid from the Akame Ga Kill.Second Division: The Akatsuki, led by Pain, from the Naruto world.Third Division: The Seven Deadly Sins.Naval Headquarters:“Everyone, be on high alert. That man... he's coming.”Four Emperors:“Sh*t, who the hell provoked him this time?!”“Someone get ready to apologize. I’ll go in person if I have to...”The Dragon Hunting Pirates — a name that makes the entire world tremble!

They had been married for less than a week when Lin Banxia discovered that without his embrace, she couldn’t sleep; without his love, she felt anxious; without his companionship, her emotions spiraled out of control.But then one day, she had stomach troubles!The hospital handed over a test result: Congratulations, Mrs. Huo, you’re pregnant.He said, “Give birth to my child, and we won’t just have three years together—we’ll have a lifetime!”She squinted her eyes and replied, “Mr. Huo, you’ve miscalculated. Clearly, after giving birth, you’re letting me go in three years.”“The child can’t go without a mother, and I can’t go without you. Understand?” That was Young Master Huo’s confession.

You thought being reincarnated as an extra-side character was bad? Imagine being thrown into the body of a villain who is disowned by his own family and discarded by the author.