MTL - The #1 Pretty Boy of the Immortal Path - ~ The first section is the alchemy class.

Everyone wants superpowers, including Alden Thorn.But even if he's lucky enough to be one of the few humans granted magical abilities by the extraterrestrial System that's been running things on Earth for decades, his goal of being a battlefield support hero is still a long way off.He's got determination on his side and maybe a murderous alien desk clerk, too.The universe is a complicated place. Alden's about to meet it.

He’s the dream guy of women world wide, the CEO of a formidable mega-corporation. But, he’s absolutely powerless against her, resorting to all kinds of methods to force her into a marriage, tying her to his side with a certficiate.

“Remember, from now on, you’re not allowed to enter unclean entertainment venues, not allowed to accept drinks from other men, not allowed to have physical contact with men other than me. If not, bear the consenquences.”

Ling Tianya felt that she was just like a girl undergoing puberty, under strict supervision of her parents, shackling her down with restrictions upon restrictions.

“Your requests are ridiculous, I have meetings and obligations, I… …”

The man held tightly onto her, as though wanting nothing more than to absorb her into himself. “Ling Tianya, this is not a discussion.” Therefore, the CEO had became a complete slave to his wife.

“My love for you is your perogative. Use me to your heart’s wishes, I am more than willing!”

But all he got in exchange was an eye roll, “Keep it for yourself, I don’t need it!”

- Description from Novelupdates

Roy’s life was nothing special. The only thing commendable was the last few moments when he saved a mother and her child from a drunk driver.
…
It’s really an egg! Damn it, what kind of monster have I become? Did I fall into Hell instead of making it to Heaven??
Join Roy as he ventures through various worlds with the Custom Made Demon King System—a system that allows Roy to draw anything he can imagine and create it through exchanging souls!

As the youngest son of a top chaebol in the Blue Star entertainment circle, Lin Zhibai thought that his life was just to eat and wait to die.

Until that summer.

The system fell from the sky, and he awakened the memory of his previous life.

“So I’m from Earth?”

- Description from novelbuddy