Back Then, I Adored You - Chapter 36

When a glorious old civilization was toppled overnight, a strange purple moon rose and thus began the Purple Moon Era.

Due to an unexpected turn of events, Xia Fei consumed a Super Gene Optimization Fluid that bore no brand, expiry date, instructions or stated its place of origin.
Our story begins here…

Due to a mistake on his student’s part, a super Martial Artist had received a wrong class in an online game and had become a mage. He who was used to curbing violence with violence and using strength to subdue strength could only make the best out of his mistake. Taking on a new lease in life, he became a violent close combat mage. When strength and magic came perfectly together, a new gaming path had been opened by him!

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“Fireball spell? Lightning Chain? Frosted Ice Mirror… etc.”

“Wait, I came here to practice Kung Fu! What has magic got to do with me?”

“I am a mage?”

“Oh, that’s right. I am a Mage!”

“However… do you really firmly believe that I am a mage?”

“Alright then, look at my knives! Look at my sword! Look at my fist! Look at my concealed weapons!”

“What? You’re now saying that I’m not a mage?”

“If you don’t believe me, I will prove it to you: If you believe me, I will show you a performance: No one can get in the way of a mage who knows Kung Fu!”

- Description from Novelupdates

I became a side-character who died in anguish because of her good-for-nothing husband.

If I can’t avoid getting married, why don’t I change who I marry instead?

“Excellent, marriage sounds good.”

“Wise choice. Then let’s have a wedding ceremony that isn’t too ceremonious. Following that, I’ll need you to go down to the Fief and behave like the lady of the house until I call for you. Naturally, there won’t be any time to spend in leisure whilst dousing yourself in luxuries.”

“I’m not marrying you, but your father instead.”

“……Pardon?”

“I’m not going to marry you. Do you have a problem with that?”