Dragoon - The way to the dragon knight - Chapter 131

This year, Ji Jingqiu is 16 years old.To survive, he envisions the Fire House Buddha Prison, plants a bodhi treasure tree, and embarks on the path of martial arts.Many years later,A brilliant light arises, illuminating endless darkness.A towering ancient tree, with emerald green leaves and a canopy like a pavilion, rises with glass-like clarity into the sky, supporting a divine realm of pure land, spanning countless ages, illuminating the three realms and ten directions.On this day,All martial artists under heaven look up to it, like mayflies seeing the blue sky.......“Within there is a bodhi tree, which I planted when I set foot in martial arts, and now it has grown to provide a canopy.”“I see everything in the world, and nothing is like me.”“That year, I scoured history books, this history without era, I looked horizontally and vertically, and saw those characters – ‘The world’s storms come from us.’”...— Excerpt from the autobiography of Ji Jingqiu, the proud sun of the martial arts world of today.

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

This is a world where a king is the most powerful.