Reincarnation Of A Swordsman: The Omni Mage - Chapter 2: New Beginnings

(Warning Mature Content R-18)After a catastrophic plane crash, a group of college students find themselves marooned on a mysterious, uncharted island teeming with an ancient, aphrodisiacal energy. As they adapt to their new reality, the island's seductive influence heightens their libidos, awakening latent powers alongside primal urges of lust, envy, and avarice.Beneath the paradise-like facade, the island proves to be a manipulative prison, thriving on their deepest desires and fears. Survival hinges on more than just overcoming the island's perils; it demands they confront the beasts within, where every alliance is tested by temptation, and every passion could lead to their ultimate downfall.

To Producers, the two of them couldn’t be more drastically different voice actors.

A lonely soul, which was placed under the care of the Lord Protector’s Manor, ended up having her lover stolen by the family’s eldest daughter and dying tragically the day before her wedding.

Somehow, she was reborn in the family as their 14-year-old first wife’s daughter, Ning Xueyan, with a startlingly familiar face.

Step by step, she will ruthlessly scheme to seek revenge as well as uncover the mystery of her tragic death.

Her former fiancee, the flirty crown prince and the bloodthirsty prince, will now bear witness to a vengeful Ning Xueyan becoming the peerless lady of her generation…

- Description from Novelupdates

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