Toaru Majutsu no Index: New Testament - Volume 15, Prologue: The Reverse Reverse Side of the Coin — Rock_on_Right_Arm.

Rumor had it that Qiao Xi had a weak constitution—a sickly beauty. Rumor had it that she spent a fortune every day on medications—eating them like candy. Rumor had it that ten servants waited on her by her bed every day—a burden to everyone. They were all waiting for the Qiao family to toss Qiao Xi back to the countryside and leave her to fend for herself.Qiao Xi: "They're all saying that I'm weak and can't take care of myself. Apparently, I spend money recklessly as well.”She looked down at her tattered shirt and was exasperated.Qiao Xi: “Are you saying that this wealthy family lets their daughter wear tattered clothes every day?”The Qiao family's rich daughter? She had enough! She would not be it anymore! Therefore…Scumbag guy: "Without the Qiao family, you're nothing."Qiao Xi: "If I'm kicked out of the Qiao family, I'll be done for."Scumbag girl: "Sis, don't be too disappointed. As long as you work hard, you'll be praised one day.”Qiao Xi: "Shut up, I don't know a traitor like you."The scumbag guy and girl: "???"Rumor had it that the Gu family's youngest son, Gu Zheng, rashly married a woman who had nothing but looks.Qiao Xi: "Is someone looking down on me?"One day, Qiao Xi saw one of Gu Zheng's employees racking his brains over a series of numbers on the computer screen. Since she was free, she lent a hand.Did she just crack the firewall created by the joint efforts of top elite hackers?!Gu Zheng inched closer with every step. "Qiao Xi, what else are you hiding from me? Hmm?"Qiao Xi: "Oh, no! I feel dizzy again! I'm so weak. This body of mine is just too weak!"

The most unexpected weird destiny,
The most intense brain collision,
The cruelest battle of life and death,
The craziest bizarre fantasy,
The most bizarre truth …
It’s the first time, and another ten years!

- Description from Qidian

All the experts were defeated, I want both beauty and wealth! The Dragon King returns to the city, bringing an end to peace! This is the legendary tale of a cultivation fiend.

In the world of Norse mythology, a human boy falls in love with Waltraute, the fourth Valkyrie sister. He wishes to marry her, but Waltraute gives him an impossible challenge to deter him.

Nevertheless, the boy is determined to carry out the dangerous task and to marry Waltraute afterwards.