MTL - I Am In Marvel - Chapter 606 Twins into the family

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

“The three elements of the easy mode of life: extraordinarily handsome appearance, exceptionally intelligent mind, and a healthy and strong body, and I have them all.”Reborn in a parallel world, the disciplined and outstanding high school student Yan Huan is preparing to welcome his glorious days.However... a decade later, he is spotted by five girls with strangely unique abilities.“...We all need to be full of positive energy.”Faced with the eager and aggressive girls, Yan Huan, who only reads the classics, says so.

“CRASH!” the last sound he heard; the last image being the smile of his friends.Jotou Howllett, a twenty-one year old nobody who finds little to no purpose in his life, wants to be a freelancer to make it big whilst trying to avoid education. He spends his last day of freedom with his friends before he's forced by his parents to attend college. That last day became his true last day as a white light flashed and he opened his eyes in a coffin, suffocating. He, now she, found herself to be in the body of a woman who had recently passed away. Jotou comes to realize that she's no longer in her world and now is in some sort of fantasy world. The rampant problems in this world soon find themselves surrounding Jotou, from the magics to the monsters to the wars between kingdoms and cities. Jotou sets out to uncover how she got here, why is she here, is she stuck here? Alongside the companions she finds in her way.

This is a therapeutic romance novel that mixes psychology and science fiction.