MTL - The Power of the First Daughter, Doctor and Concubine Dominates the World - Chapter 20 see no

Haruma Kazuki is a cursed (or maybe just deeply unfortunate) high school student whose lewd, panicked, or absurd thoughts literally manifest in reality — especially when he tries not to think about them. The more he denies or avoids feelings, the more chaotic and trope-heavy the consequences.

The world that nurtured the civilization which reached the pinnacle of magic was on the verge of destruction.
The last survivor transmigrated to the past, when the magic civilization started growing, as countless mages were still fumbling their ways through the thorny paths of magic knowledge.
He, who came from the end of the magic era, aim to reach the pinnacle of magic.

- Description from Novelupdates

Sheng Jiaoyang, a human-beautiful, poisonous and scumbag full-level troublemaker, abducted a system, defected to the Space-Time Administration, became a freelancer, and began to happily rule the world in various worlds.

As a result, if they were not careful, everyone became a snake spirit.

The dandy second son on campus, the playful second son of a wealthy group, the dangerous and powerful sea monster, the cold and noble overlord… These are the proud sons of heaven who should have had a smooth life, but they all encountered disaster.

Jiao Yang: “It’s all because of my beauty.”

system:”……”

- Description from novelbuddy

At home, she was invisible; after marriage, she was a decorative vase; in the end, a sea of flames buried her, and not even her corpse remained. This is the portrait of Han Yuxi’s previous lifetime. Given a chance at rebirth, she strives to improve herself, wishing only to no longer serve as a foil or a pretty face. Then, she will seek out an exemplary husband and live a life of peace and prosperity. Alas, things turn out contrary to her wishes—she marries a man who bears a blood feud and hatred as deep as the sea. She turns the world upside-down, but her road to happiness is strewn with setbacks and the sweetness that comes after bitterness.