Toaru Majutsu no Index: New Testament - Volume 1, Prologue: The People Who Became the Protagonists by Some Kind of Mistake. War?

.In order to make up for the regrets of his past life, Ye Fan transfers to the high school Ning Xi attends after his rebirth, finding the beautiful figure from his memory. In his memories, Ning Xi lay on the operating table, using her last breath to say, “Brother, I... I like you...” In this life, watch how Ye Fan conquers the heart of the soft and genius school beauty step by step. ...

Transmigrated into the book as a cannon fodder female supporting role, the ex-wife of the male lead who hasn't divorced yet. Gu Fuqiao just wants to say no!

The servant looked at the grieving princess. “Your Highness, the Regent Prince sent your scholar fiancé to the Western Butcher’s daughter!” 

The princess gritted her teeth, speaking to her servant that it matters not as she has other suitors in line. Many days later, much to her dismay, the servant ran in a hurry. “Your Highness, the Regent Prince expressed his intention of becoming your suitor! All other men in line were sold to Gou Lan Red District!”

The princess was distressed. She said to her servant it matters not. She’ll soon be married to Prince Fuma. Then the uneventful came. The servant once more ran to her, almost tripping in the process. “Your Highness, Prince Fuma was imprisoned at home! Meanwhile, there’s a red sedan chair waiting at your residence for your marriage! It was led by the Regent Prince!

The princess was stunned. For a day such as this to come, it seemed impossible. This nothing but a sad story of a female boss crossing back in time to hold the thick thighs of the big boss. But while raising him, she was eaten in the process.

Upon opening his eyes, Muyang realized that he found himself in Dragon Ball’s world filled with dangerous people like Vegeta, Frieza, Cell, Majin Buu.