Childhood Friend of the Zenith - Chapter 13: Obsidian Insignia

He Lang died by his own hands for the sake of his imperial younger brother’s ambition, whom he loved. He was offered to be reborn in exchange for giving up his past romantic feelings. Reborn without the burden of his romantic feelings, he brings with him a manual to new worlds. He wholeheartedly followed the instructions of the manual to complete the tasks, not knowing that the originally slag gong was blackening…
He pleaded to his affectionate Emperor brother to release him, he pleaded to the paranoid prisoner next door, but until the end he remained baffled.
In the end, he discovered that the full name of the manual was – “Slag Shou Cultivating Manual”
Σ (っ ° ° °;) っ!

- Description from Novelupdates

I met the male lead in prison.

She is the Crown Prince’s fiancee, but on the night of their wedding, an edict was made and she was given off to marry the crippled and paralyzed God of War.

On their wedding night, the paralyzed groom pressed her under his body: “Do you want this prince to kill you or poison you?” Lin Chujiu is a famous surgeon so she wouldn’t feel threatened that easily. She turned and pressed the crippled man under her body: “Say, do you want me to completely waste your legs or waste your third leg?”

She is a genius surgeon doctor in Modern Era that was transmigrated into the body of the Eldest Miss of Lin Family.

He is a famous prince that named as the God of War and was feared by many.

“I, Lin Chujiu, am not a good woman. I do not know how to write melodramatic words.”

“I am in love with you and willing to do anything for you. I will bear the blame of our country or even help you seize the vast territory of our motherland…”

“I hate you, I am willing to pull out your heart, take out your bones and after you lose your life I will destroy this picturesque country…”

- Description from Novelupdates

Shen Yinning was originally the Crown Prince Lu Ying's childhood sweetheart and fiancée, but due to her father and brother's rebellion, she was exiled to Gan State and married to a minor local official as the daughter of a criminal. Meanwhile, Lu Ying gloriously married her cousin Shen Yunxi as his Crown Princess Consort.Three years later, Shen Yinning returned to the Capital with her husband. Everyone praised the Crown Prince and Princess for their mutual respect and harmony, and Shen Yunxi often flaunted in front of her how loving she and the Crown Prince were. However, only Shen Yinning knew that the seemingly restrained and honorable Lu Ying came to her chamber every night, completely disregarding the fact that she was now someone else's wife, secretly claiming her and keeping her as his Forbidden Fruit...