Supreme Casanova: Ultimate Harem System - Chapter 298: Got you.

A high-ranking officer in the Marines and a master of both Western and Chinese medicine, Feng Yu Heng is transmigrated with a duang sound to the Da Shun Dynasty.

Her father is distant, her grandmother is unloving, her mother is sick, her brother is young, and her sisters are hateful, with each more ruthless than the previous.

After transmigrating and being reborn, she definitely cannot continue being a good-for-nothing like the previous owner of this body.

Want to compete with me? It will be complete domination!
Want to cause me harm? A single scalpel will turn you to mincemeat!
Want to play dirty? A needle will paralyze half your body!
Want to kill me? A single scratch will disembowel you!

The formerly easy-to-bully completely transforms and becomes the most desired of Da Shun Dynasty. A hospital to be opened with the Emperor will bring the adoration of the masses and a great deal of wealth. But what’s this about a marriage to this absurd prince? What does the cripple have to say?

- Description from novelupdates

The Earth mutated and an entire city disappeared from its original world! Su Yi arrived in the Different World strangely with the whole city, where demons ran amok, dynasty hegemony. There was no peace of modern civilization, only the law of jungle! Fortunately, his phone also changed... Gods, demons, monsters, Buddhas, fairies, etc., were all pulled into his mobile phone for his use! I am the king of demons, and I am the Lord of gods!

On her wedding day, she was humiliated; her status as the legitimate wife was instantly changed into that of a concubine.

Dear father and mother.

Please forgive this daughter who is tainted.

I, Cecilia Silvy, will strive to continue to live peacefully…

I have decided to become a man!

High school student Hiyono Kanzaki reincarnated as Cecilia Silvy, the villainess lady of the otome game “Wruhel Academy Saint Princess 3”.

In order to avoid her miserable future, she decided to spend her time at Wruhel Academy, the main stage of the game… as a man.

Will she be able to complete her school life without anybody discovering the truth?!