MTL - The Demon Lord of the Shadow Queen - Chapter 42 gradually become clear

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!

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Form, feeling, thought, and awareness, the four truths and five aggregates refine the truth,

Gong Shangjiao Zhengyu, five tones and six rhythms come into the sword.

A liberal arts student crossed over with a pile of Buddhist scriptures and Taoist scriptures,

“Monster, you are predestined with me, why don’t you follow me back to the cave to practice!”

“Master, can I marry a wife if I practice with you?”

“Why don’t you turn left when you go out, there is a school of sword practice over there.”

There is also an old book “Chunyang Sword Master”, which can also be read step by step.

- Description from novelbuddy

-Welcome back home~Shall we start with a bath today, or eat first?-Isn't there a third option?-Nope, so let's eat first. I made omelette rice today.-Speaking of omelette rice, there should be that 'maid magic', right?-I really can't handle you... moe moe kyuu~ make it taste good~ moe moe chu~-And what about a heart with the fingers?-I'll give you a head with my heart!The maid finally lost her patience and slammed the omelette rice onto Lin Shuang's head.Lin Shuang: That feels better.

She was a medical expert, talented and beautiful. She was reborn as his little wife. Her in-laws did not like her, her husband did not love her, and she was as timid as a mouse. She was weak and easy to bully.