My Desertion Would Be Faster Than Heros' Obsession - Chapter 34Vol 2.

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

A National Treasure—a hero who rightfully deserved everyone’s respect.They were those who dedicated their bodies, minds and skills to protect the defense and honor of the nation.They were directly related to the nation’s strength.

A young man from the Miaowei Tribe brought up by his strict father, suddenly turned into Wizard I on the day he was orphaned. He then obtained the ability to control giant worms.

After the Catastrophe, every rule in the world was rewritten.