Rebirth in the 90s: Melting My Devoted Mr. Iceberg - Chapter 31: Feeling Shy!

Xia Yan passed through to the world of Bleach and became an eleven-year-old boy. He was rescued by Renji and Rukia in the Seireitei, and he was studying at Shin’ō Academy, and he was a student of the same class.
He is a top student of the Shin’ō Academy, and he is vying for strength by various teams. In the end, he has entered the first team of secret mobile maneuvers.
He will use punishment to kill every person who tries to threaten the martyrdom and protect his loved one.

- Description from Novelupdates

“It was a book.It was a scripture.”Its cover was made of the skin of those who hold a grudge against humans.Its words were written with the blood of those who hold a grudge against heaven.Its weave was created from the sinews of those who hold a grudge against earth.The ancient demonic object, restraining darkness shaking heaven scripture (制暗震天經).Yeon Sang-hyeon, who signed a contract with the restraining darkness shaking heaven scripture at the last moment of his days, is now rewriting his own destiny.The peerless genius met the ancient demonic object!

On the eve of their wedding, Yan Changsheng brought back a girl and publicly called off the marriage.Only then did Shen Qinghe realize that Yan Changsheng was the crazy male lead from a book, and the girl was the irresistible female protagonist.As for her, she was just early cannon fodder fated to die, and her elder sister was the malevolent female supporting character whom everyone wanted to beat up.Tsk, the plot is just freaking ridiculous!After awakening, Shen Qinghe busied herself with cultivation, protecting her elder sister.Yet, unknowingly seizing the female protagonist's luck, she attracted several crazy male leads, each of them forcibly taking what they wanted from her.She thought Dongfang Wuya was relatively normal, but who knew he was crazier, actually seizing the position of Heavenly Emperor and then forcibly marrying her to become the Heavenly Empress!**As the high and mighty belle of the cultivation world, Dongfang Wuya had countless admirers and fans. Yet he was devoted to cultivation, treating love as if it were dirt.Initially thinking Shen Qinghe was deeply in love with him, he sternly advised her, “Focus on your cultivation, do not get distracted by romantic entanglements!”Later, irked by her dedication to cultivation, he pressed her into his arms and kissed her, seductively coaxing with a playful smile, “Be my Daoist companion, and I'll aid you in cultivation, hmm?”[Asura Field, Cremation Ground, Male Rivalry, Su Wen]

Having lived a normal life all his life and died without being able to fulfill his desire and when he’s given a task by a god, watch how he takes the protagonists girls while making it hard for the hero.