Water Magician - Extra 16 Rondo’s Last Stand

Oosuki Masato is an ordinary high school boy who is magically transported to an alternative world, but for some reason his doting, over-protective mother comes along as well.

Joseph Knox, one of the most prolific and well-known serial killers on the planet.A person considered so demented and manic that even trying to reason with him was believed to be a waste of time. A man so far gone that he seemingly didn't deserve any pity even on his deathbed.So why? Why would a man like him receive a second chance? And why did the world around him seem so familiar?Disclaimer: AU when it comes to some parts of Madara's plan(I'll try to make it make sense at least), and aliens don't exist in this world

Shen Yubai from the international class is a wealthy young master, enormously powerful and notoriously difficult to deal with, haughty and proud. The transfer student, Shen Sinian, is fresh and handsome, sunny and cheerful, with a mysterious background, almost mythical.Xu Chuning from the regular class and her mother rely on each other, living a meager life, attending school with the aid of scholarships. She should have nothing to do with either Shen Yubai or Shen Sinian.However, recently, schoolmates have noticed that she and the transfer student Shen Sinian are unusually close, their interaction ambiguous. Shen Sinian seems to do everything she says, whereas Shen Yubai from the international class shows special attentiveness towards her.One day, schoolmates even overheard Shen Yubai cornering Xu Chuning, asking her in a deep voice, “Who is better, me or Shen Sinian?”Classmates: “?”Is this some kind of love triangle showdown?

When you get to the other world, you acquire new properties, there is no limit for your achievements and you become an overlord…Welcome to my world…

- Description from Novelupdates