The Bootlicking Antagonist Wants to Survive,but Female Lead refuse to - Chapter 13: The Villain’s Self-Cultivation

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

With a square halberd in the palm, and a red rabbit and horse under him, nowhere can the world go!

- Description from novelbuddy

In the Province of the Nine Skies, far above the heavens, there exists Nine Galaxies of Astral Rivers made up of countless constellations interwoven together.

This novel is a blend of the anime Oregairu, focusing on Hachiman Hikigaya as our main character, and Classroom of the Elite, intertwined with a sweet romance. Give it a read and decide whether to continue based on your experience!