Toaru Majutsu no Index - Volume 12, Chapter 5: Vaguely Passing Sunset. Hard_Way,Hard_Luck.

Perry Z has a Magical Destiny.Born to a Magical Fantasy Princess and a nine-to-five Supervillain, Perry's never felt...adequate. He's completely magically dull, and without a scrap of superpowers.When The System boots, he's forced to follow in his father's footsteps, but he'd rather take after his mother.Maybe there's a way he can do both...

Yin Li was born with a pure Yin body. He possessed the body of a male but the fate of a female, his Yin and Yan energies fully inverted. Because of this, his family’s old ancestors claimed he wouldn’t be able to live past twenty years of age.

To prolong his life, his parents fostered a furnace whose energy he could harvest to nurture his own.

As Yin Li looked at the frail and delicately charming boy in front of him, he felt his heart stir with compassion.

The Heavenly Path is carried through reincarnation, life and death are decided by fate.

He couldn’t simply ruin this pitiful child for the sake of his own selfish interests. Instead, he kept the small boy at his side, spoiling him and raising him as his trusted aide.

He truly believed they shared a master and servant’s pure and honest affection, not at all realizing that that wicked boy had been rotten from the start. The delicately charming small boy who was spoiled day and night only ever thought about two things:

1. Why hasn’t master bestowed his favour on me yet?

2. Just how can I climb into master’s bed?

- Description from Novelupdates

As I was writing a brutal review of a popular Nationalistic Superpower Light Novel, I was made to possess a character in it!I then joined an evil organization and was given one mission.To seduce the Heroine.“Oh, that’s not how you should use this power.”As I started to advise the heroines on how to wield their power, things began to go wrong.

Wei Yuewu is the unloved daughter of the powerful Marquis Hua Yang. On her way back to the capital city to marry her fiancé, she becomes the target of a ruthless assassination led by her fiancé, Marquis Jing Yuan. With the help of the Prince of Yan State, she narrowly escapes from one disaster after another and returns to the capital. Determined to avenge her enemies and unravel the mystery surrounding her engagement with Marquis Jing Yuan as well as the death of her mother, Wei Yuewu makes a deal with the Prince of Yan State. However, just as she has triumphed over all her enemies and is about to reach the acme of her life, she deliberately destroys her own future and becomes an exile of her own…

- Description from Novelupdates