In The Supreme Fantasy World, Back In Time And Do Whatever You Want! - Chapter 36 - . New System Function!

What happens when a scientist from a futuristic world reincarnates in a World of Magic and Knights? An awesome MC is what happens! A scientist’s goal is to explore the secrets of the universe, and this is exactly what Leylin sets out to do when he is reincarnated. Dark, cold and calculating, he makes use of all his resources as he sets off on his adventures to meet his goal. Face? Who needs that… Hmmm… that guy seems too powerful for me to take on now… I better keep a low profile for now. You want me to help you? Sure… but what benefit can I get out of it? Nothing? Bye. Hmmm… that guy looks like he might cause me problems in the future. Should I let him off for now and let him grow into someone that can threaten me….. Nahhh. *kill*-

Alternative: Leylin is transported from an advanced technological era into a medieval world— except there’s magic. Equipped with “only” his quick wits and an A.I. chip fused to his soul, he sets out to become the most powerful magus the world has ever known. In a land divided into the Light and Dark Magi, the weak can either be cattle or disposable slaves. Only the strong can determine their lives, and only they have the luxury for virtue. Yet strength is only a tool for Leylin, like any other. His goal, in the end, is his own.

A heroine dedicated to creating great wands and magic props;
A heroine dedicated to 100%(?) avoiding mischief and bad luck;
Meet George Weasley, a resourceful(?) daring, careful prankster for twenty years.
Is their collision a lose-lose or a win-win cooperation?

This is the story of Miss Ollivander, who doesn’t know the development of HP’s story, and the lovely Weasley family, George. In addition to the magical joke product and the Horcrux Deathly Hallows, how can other magical items help in the world of HP?
[I want to save all the characters I want to save]

Editing!
I reread the first few chapters over the weekend and found a lot of typos and bugs. In order not to affect your reading, I will revise a few chapters every few days. The plot will not change, but I will fix the problems raised by my friends in the comments before~ Sorry readers who have read it!
Content Tags: Anglo-American Derivatives

Search keywords: protagonists: George Weasley, Gwen Ollivander ┃ Supporting roles: Fred Weasley, Harry Potter, Ron Weasley, Hermione Granger ┃ Others: HP Doujin

One sentence introduction: If you can’t save the world, then save your brother?

Intention: fall in love with George Weasley, do scientific research, and invent. If you can participate in saving the world, accompany your boyfriend to help.

- Description from novelbuddy

The whole world knows that she loves me, but only I know that I am a substitute!

When Jiang Liuyi was twenty-six years old, she caught up with the fashion and got married randomly.
The flash marriage partner was a woman of her age, with a good personality and a good temper.
What my friends envy the most is being obedient to her,
Even knowing that she was a random substitute because he broke up with his ex-girlfriend,
There is no complaint or regret to stay by her side, and it is as sweet as it is.

Jiang Liuyi was very useful.

Later, her ex-girlfriend returned to China, and the two needed to meet for business reasons.
A friend teased her about kneeling on the washboard when she got home. She was stunned for a while before she realized,

Her wife never asked about her ex-girlfriend.

In a word: You have the white moonlight, but I have the cinnabar mole.

Content tags: Marriage and love Slapping face Sweet text Cool text
Search keywords: Protagonist: Jiang Liuyi, Song Xian ┃ Supporting role: ┃ Others:
One sentence introduction: You have white moonlight, I have cinnabar mole
Conception: Deep love is not as good as long-term companionship.

- Description from novelbuddy

After being framed by her stepmother, she had spent the entire night with that mysterious man. In the end, she was forced to leave another country. Five years later, she returned with a pair of beautiful dragon and phoenix treasures! However, on the day of her return, she had offended the handsome CEO. What shocked her even more was that this CEO and her son looked exactly the same! “A pair of cute photos of Gongzi Bao accidentally went viral on the internet. One day, the CEO stepped forward and blocked her path.” “Woman, let’s talk about the right to the care of children!” “Let’s not talk about it!” A man placed her against the wall, “Alright, let’s not talk about our children. Let’s talk about when we can get a marriage certificate!”