I Want To Have A Yandere - Chapter 10: Class Part 1

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

Sian Lee, the strongest person under the heavens in old china, was reborn as a very overweight woman.

Jiaang Lin, a man who died saving someone, wakes up in a new world atop the Flame Beast Plain within the Profound Fire Kingdom. Greeted by the Infinite Skill Points System, he embarks on a quest to become the strongest.With memories of his past life and newfound abilities, he quickly upgrades his skills to maximum levels. But as a fiery giant wolf attacks, can Jiaang Lin truly rely on his system to survive and fulfill his ambitions?