Mythical Era: I Evolved Into A Stellar-Level Beast - Chapter 1289 - 500 Grinding Away the Rules, Starting Again (First Update)

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

“Your servant is Majestic Star ‘Panther Head’ Lin Chong, from this day forward I am your woman!”

Have you heard of it?In the dead of night, if you turn on a music player, put on earphones, hide under the blanket, and listen to a single on loop…After it loops forty-four times, you will fall asleep. If you are unlucky when you open your eyes again, you will no longer be lying on your bed, but you will enter a strange space completely isolated from reality.That space… On the surface, it looks like the places we usually see—your bedroom, living room, underground parking garage, bathroom, basketball court, construction site, and so on. But if you observe carefully, you will discover that they are different… Everything is different.***This is the experience of an ordinary person who, after acquiring superpowers, transforms and grows step by step in Dead Ends to reach the peak.

After experiencing heartbreak from being abandoned, he enlisted in the military.

And then, he became a war hero.