Valkyrie's Shadow - Chapter 7Birthright: Act 2,

In her third year living in this steampunk world, Ciel gained the ability to simulate both the past and the future.These simulations turned into a game where she could act without restraint, and after countless trials, real life became a replica she could navigate as though speedrunning it.Churches, potions, mutations, the Old Gods, witches, sealed artifacts… none of these have anything to do with Ciel. She’s just an ordinary girl who wishes for a peaceful life.She just happens to be particularly skilled at snuffing out danger before it even begins.

Pei Jiu picked up a girl by the riverside. He settled her on the mountain, and planned to send her back once she recovered. This delicate girl was a useless crybaby, so Pei Jiu had to be a nice person. He cooked her food and washed her clothes. He let the troublesome girl ride on his shoulders so she could pick fruits. During winter, he would warm up the bed for her. One day, she hugged Pei Jiu’s arm with a smile. “Big Brother Pei, you’re really an honest and a good man. I will marry you and give birth to your babies!”

Pei Jiu eyed her critically and scathingly enumerated her shortcomings. She was ignorant and spoiled. She only knew how to pester and flirt with people all day long. Give birth to babies? Go ahead, give birth to caterpillars.

The delicate girl bawled so hard that she passed out. The next day, Pei Jiu returned to his mansion and told his servants to prepare for his wedding ceremony. When he returned to the mountain in the evening, Pei Jiu opened the door as usual, but he found that the cheeky girl had disappeared. He searched the whole mountain for her to no avail. No one would act like a spoiled brat in front of him anymore. What a headache.

Note : 娇 (jiāo) : tender/delicate/pampered/spoiled

- Description from Novelupdates

[Simulation] + [Isekai] + [Goblin] + [Harem]After a long sleep, I awakened in a new life—as a goblin. Weak and insignificant, I found myself reborn as the lowest creature in a world filled with hostility and danger. But from the shadows of this cruel world, a silent rise begins...

A teenager named Evan Mason was reincarnated into the magical world of Harry Potter and goes to school at Hogwarts!
With only his knowledge of the future and great talent for magic, he takes the path towards the top of the magic world, only to realize that ever step he took, changed everything!

- Description from Novelupdates