The Alpha's Stolen Luna - Chapter 15: Shift

I was proposed to by the Final Boss.

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

“Not even the gods can stop me from finding my family!”Max only wanted to reunite with his parents and sister. But for that, he had to awaken a class.With no high expectations, Max would’ve been satisfied with a C or D rank.But fate had other plans. He unlocked a legendary SSS-Rank class.[Dimensional Keeper]This class changed everything.Max mastered every skill to perfection and grasped the Concepts of Space and Time while his peers were playing around with swords.In no time, he ascended to become the Keeper of the Universe. Armed with unimaginable power, Max’s journey to find his family had begun.Nothing could stop him now—not fate, not enemies, not even the mighty gods!

Uchiha Kai has been cautious since he came to this world. He vowed that he must be cautious and go to the end.

But one day he received a mission – to cover the wave wind team to blow up the Kamabashi Bridge, Uchiha Kai knew that he was going to be unlucky…

- Description from novelbuddy