MTL - Female Protagonist is a Blackened Villainess - Chapter 1 The system is used for squatting

Xia Yan passed through to the world of Bleach and became an eleven-year-old boy. He was rescued by Renji and Rukia in the Seireitei, and he was studying at Shin’ō Academy, and he was a student of the same class.
He is a top student of the Shin’ō Academy, and he is vying for strength by various teams. In the end, he has entered the first team of secret mobile maneuvers.
He will use punishment to kill every person who tries to threaten the martyrdom and protect his loved one.

- Description from Novelupdates

Wang Yi was reborn in a parallel world. Just when he was gearing up for eighteen years to flex his muscles, the belated Golden Finger came online and threw him into a low-magic world for three full years. After learning a lot of magic knowledge in three years, Wang Yi was kicked back to modern times…

What is the combination of magic and technology? Magic technology? Black technology?

The troublesome material science problem was solved, and many mysteries became reasonable after the addition of magic.

However, when Wang Yi just came back, he still decided to use a captured Wraith to knock out an artificial intelligence to be his housekeeper…

Also known as “My Skull Can Turn Screws”, “This is not magic, it’s black technology”, “There is no magic in this world, everyone should believe in science”, “There are no ghosts in the mobile phones I sell”

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The book “The Evil God Is Myself!” has been completed! “, “Infinite Prophet”, “Eye of Breaking the Law” and other works, you can eat them with confidence.

- Description from novelbuddy

The whole world mutated. Mysterious resurrections happened in real life. The Tribulation descended.