My Vampire System (WN) - Chapter 34: Caught Red handed!

Utsuro no Hako to Zero no Maria, or The Empty Box and The Zeroth Maria, tells the sinister story of Kazuki Hoshino, who is almost madly attached to his everyday life, and his antagonist Aya Otonashi, who suddenly transfers into his class—for the 13,118th time. She majestically announces to “break” him, without paying heed to anyone else around them.

He became a teacher at the best magic academy in the empire.
….For being mistaken for someone else.

A boy awakens alone in the Fairy Tail world, lost and uncertain. As he ventures through this magical realm, he unravels the secrets of his mysterious new identity, unlocks hidden powers, and carves out his destiny in a land brimming with wonder, danger, and limitless adventure.“Check out my other work, Reincarnated as Ash: A Pokémon Tale.”

Ye Xuan, the youngest Martial God of the Heavenly Realm, was ambushed by the four major powers of the Heavenly Realm, resulting in the destruction of his golden body, leaving only a wisp of his martial spirit to escape to the mortal world, reincarnating into the body of a noble family's scion, Ye Xuan, in the Daxia Kingdom.With all sorts of martial arts and divine-level techniques in his possession, from that point on, Ye Xuan shook off his reputation as a waste and defied destiny. Rising step by step from the bottom, he sought revenge for his father, pursued dominance over the mythical lands, traveled the spirit martial world, and returned to the pinnacle of being a Martial God, aiming for the supreme position.Treasure, beauties? Nothing poses a problem! Geniuses, monsters? They all bow at my feet!The peak of martial arts, defying the heavens, stepping on the Heavenly Realm, becoming the supreme!