MTL - Lessons on Raising a Partner - Chapter 7 Eat and eat

He is a young man without a spirit root. It is believed that this denies him the chance at cultivation. However, a mysterious lady imparts a Supreme Demon Classic to him and from then on, he starts his path of cultivation.
He undergoes a total transformation to emerge as the most fearsome and powerful fiendish demon in his era, that even immortals and fiends are fearful of him, and saints are at his beck and call.
Mastering the Supreme Demon Classic is the turning point in his life. He is able to unleash his immense and divine power from within, illuminating the entire universe!

- Description from Novelupdates

In the year 298 from the era of the gods, elementary school girls Sumi Washio, Sonoko Nogi, and Gin Minowa are tasked with an important mission. They are to become heroes and fight Vertex, a mysterious enemy that is attacking Shinju-sama, the god tree that protects Shikoku, the only area in the world that is still habitable. What they don’t know, is that this fight will cost them more than they could have ever imagined.

After 2000 years has passed, the ruthless demon lord has just been reincarnated! But his aptitude at an academy for nurturing candidates for demon lords is, “Inept”!?

Nan Qiao became a fake heiress, despised by her adoptive parents, and was sent back to her biological parents.Overnight, Nan Qiao transformed from a ridiculed fake heiress of a wealthy family to the true heiress of the richest family.Her parents adore her, and her brother pampers her, leading a life everyone envies.Does Qiao Qiao want to study? She can choose any prestigious school!Is Qiao Qiao bored? She can play with any company!Does Qiao Qiao want to drive? She can pick any luxury car!Does Qiao Qiao want to shop? She can swipe the black card at will!Does Qiao Qiao have an engagement? That's not allowed!Rumor has it that the powerful CEO Li Yihan is violent and moody.How can darling Qiao Qiao be with such a beast of a man? The engagement must be canceled.Li Yihan: Who said that? Arrest anyone who tries to sabotage the marriage.People: Mr. Li, didn't we agree that you're not violent?Some said Nan Qiao is not worthy of being the richest heiress, just a pretty face.Later, the designer is her, the medical genius is her, the investment prodigy is her, and the Li Madam is even more her.Wait a minute, she doesn't want this title!Li Yihan: This title is a must!The fiancé who came to cancel the engagement regretted it and clung to her every day.Qiao Qiao is bullied? Li Yihan captures the person, beats them until they kneel, and apologize to her.Qiao Qiao wants to work? Li Yihan gives her ten companies to choose from.Qiao Qiao has no jewelry? Li Yihan buys a room full of jewelry for her.Qiao Qiao has no high fashion? Li Yihan delivers all the world's high fashion to her doorstep.Qiao Qiao is mocked for canceling the engagement? Li Yihan steps forward: I was the one who was dumped, you all shouldn't spread rumors!