The Ghost King's Wife is Sassy and Beautiful - Chapter 3: Two Little Buns

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

Lin Fan awakens to a world where chaos reigns, stripped of family, status, and safety. But within the turmoil, he discovers a powerful secret—the Beast Abilities system in his mind.With every threat he eliminates, he earns vengeance points, enabling him to level up his physiques.From the humble Wild Rabbit’s ability—[Rabbit's Hearing], [Swift Foot], [Magnificent Leap]—to the ruthless strength of the Wolf—[Hunter Instincts], [Iron Claws], [Leader of the Pack]—and the Ape’s raw power—[Climb Trees], [Strong Arms], [Inhale Qi]—Lin Fan hones his skills with every battle.Years later, as the feared grand master of a prestigious sect, he looks back in wonder. Who would have believed that his rise to greatness began with the unassuming gifts of a wild rabbit.

Dreaming back to the Tang Dynasty, being an ordinary person, greedy for money, lustful, debauched and free.

- Description from novelbuddy

Untolerated by heaven, a boy was restricted by the most powerful spell.

He accidentally acquired a painting inhabited by nine souls that claimed to be immortal.

Then, the legend of a strong young man who violated heavenly principles against the course of nature began.

- Description from Novelupdates