Harry Potter: Eclipse. - Chapter 13:

This is the story of a person who transmigrated into a world with a radically different worldview.

Beneath the peaceful façade of the modern world, an undercurrent of shocking crimes roils in the underbelly of society.

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.

He was the youngest guru of martial arts as well as the perfect Mr. McDreamy of the most girls. He had mysterious absolute touch, clear-sighted observation ability and various outstanding talents.