Feng Yin Tian Xia - Chapter 4

He is a young man without a spirit root. It is believed that this denies him the chance at cultivation. However, a mysterious lady imparts a Supreme Demon Classic to him and from then on, he starts his path of cultivation.
He undergoes a total transformation to emerge as the most fearsome and powerful fiendish demon in his era, that even immortals and fiends are fearful of him, and saints are at his beck and call.
Mastering the Supreme Demon Classic is the turning point in his life. He is able to unleash his immense and divine power from within, illuminating the entire universe!

- Description from Novelupdates

Based on the popular Vocaloid series, by HoneyWorks, called “Kokuhoku Yokou Renshuu (Confession Rehearsal)“:

Natsuki, a third-year at Sakuragaoka High School, who holds unrequited feelings for her childhood friend, Yuu, who’s in the Film Club. However, instead of being honest about her feelings, she makes him be her confession “rehearsal” partner. Unable to say her true feelings, things start to get complicated when Miou and Akari, who are also in the Art Club, get involved! Will she ever be able to confess for real!?

「Shimizu-san, you dyed your hair black.」「Ah, yes.」「Why did you dye it all of a sudden?」「Because…yesterday…」Shimizu-san, who sat next to me and had dyed her hair from blonde to black gradually lowered her voice, slightly blushed, and laid her face down on the desk.

The great cultivator Qin Zhao, unable to bear the torment of her treacherous disciple, chooses death but ends up reincarnated as a scandalous starlet in the modern entertainment industry.This starlet is notorious for not taking her career seriously, engaging in underhanded tactics and is shunned by all top celebrities.Forced to make enemies and infamous, Qin Zhao retorts: I only know fortune-telling, keep the negativity coming.Using her skills in fortune-telling and feng shui to exorcise evil and dispel disasters, she becomes the honored guest of various magnates, turning haters into fans.However, her husband, a man of immense power and unpredictable moods, who is cold and difficult to handle, increasingly resembles her former disciple.Qin Zhao promptly serves divorce papers, demanding him out of her life. But the cold but elegant Dr. Chu reveals his true nature, desperate to keep her.Clutching her hand, he holds a scalpel to his chest, declaring, 'Zhao Zhao, you can take my life anytime, but you cannot leave me.'You destroyed and rebirthed me, thus my life can only be yours thereafter.ps: The fierce and cool female immortal master X from white to black, a seemingly cold but drama-loving doctor.