The Heroine is My Stepsister, and I'm her Final Boss - Chapter 10: "Tea and Trust."

Jiang Xun was transmigrated as a cannon fodder. Her mother died when she was young, her stepmother schemes against her, and her father abandoned her in a village. But Jiang Xun didn’t panic, and she was a person who always won by virtue.

Thieves would say, “Stop hitting me, I’ll change careers!”

Thugs would say, “Stop hitting me, I’ll return the money!”

At the Jiang family banquet, guests were watching her every move, waiting for her to make a fool of herself. “I heard that she’s been living in the village for eleven years and has a country bumpkin-like feel to her. If I were the Jiang family, I wouldn’t risk her embarrassing me by letting her attend.”

Mr. Jiang said to her, “Stay behind your mother and don’t speak lest you embarrass yourself.”

Her stepmother nodded. “The Qin family’s patriarch, Qin Mufeng is noble, benevolent, and abstinent. Don’t even think about someone like him; he’s completely out of your league.”

Sure. She didn’t intend to marry into a rich family anyway. She just wanted to beat up the man in the rumors. But why was this man following her around all day every day?

Legend says, that there is a great demon, who is the human kind’s public enemy. He is the galaxy federations’ nightmare as he wanted to conquer the whole universe. On the first day, he completely took out the human fleet, plunging them into disorder. On the second day, he declared that he will wipe out the whole federation. On the third day, he declared——that the hero who shot him in their previous battle must marry him, or else, he will destroy everything.

The galaxy federation president and the council members had a long meeting after that. They decided to dispatch a soldier, Wu Xing Yun, and marries him off to the arrogant demon. Wu Xing Yun was once a hero who fought for the nebula, and henceforth, he was tasked—— for the sake human race and the universe’s peace, to eliminate mistresses, settle his matters with the mother-in-law, and fix the man’s crooked ways.

Wu Xing Yun was very perplexed when he asked his commanding officer: “Sir, why did it have to be this way?”

Commanding Officer: “Soldier, bear in mind, that this mission of yours, is for the sake of the universe and mankind’s happiness. You must hold on to your husband, and fight other mistresses! Do you have the confidence to accomplish this task?”

Wu Xing Yun, stood straight, saluted, and instinctively replied: “Sir, yes sir! I will accomplish this task!”

- Description from Novelupdates

Reincarnated into the Douluo Continent, inheriting the Emerald Scorpion Martial Soul, with no other options—what should you do if you’re forced to play with poison? Chen Ming declares: “If I’m going to play with poison, I’ll make sure to excel at it. As a transmigrator, even playing with poison, I’ll set an example worth following.”(Anti-Tang San, multiple female leads, no affiliation with the Spirit Hall, self-created divine position.)Raw Title: 斗罗：翡翠毒皇

“Look at you, you were this teeny-weeny when you were little.”Using both hands, Shao Zifeng gestures how small his pet beast used to be. He then raises his head and looks at the gigantic being in front of him.“Just how did you grow into this ferocious form?”