MTL - I Know Everything - Chapter 19 People who buy secret recipes

What happens when a fanfic author with a habit of lying and scheming suddenly finds himself as a self insert during Duelist Kingdom? What happens when you have Yugi, Joey, Kaiba, and the rest encounter someone who knows all about every major player in their saga... and sees no problem with abusing said knowledge? Chaos, dear reader. Sweet, sweet chaos

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?!

Shao Ci was bound to the ‘Befriending the Most Powerful Person’ system. After crossing through, only then did he discovered that as long as a more powerful person emerge, this unscrupulous system will immediately change the ‘capture’ target….

- Description from Novelupdates

To save a doomed fantasy world, I killed the main characters, then destroyed the game world, and fell into another timeline as the academy's top seat and rival to the protagonist.Now, I'm trying to save the world and steer it towards a better ending…But I'm the final boss.