Toaru Majutsu no Index SS - Volume 2, Chapter 6: Getting to the Heart of the Discussion at the Beauty Salon. The Fourth Friday of April.

The main character Lei Yu does not have the ability to practice his family’s martial arts. He gets stepped on and tossed around. Due to certain reasons, he leaves the family, coincidentally gains an ability, and makes his own path to becoming an immortal.

- Description from Novelupdates

High school student Mikoshiba Ryouma was summoned to a different world in the middle of a war. Sensing the malice from the one who summoned him (a summoner of the O’ltormea empire), he uses his martial arts to run away, killing important people of the empire during his escape. After the escape, he rescues two twin sisters from the hands of thieves. The sisters who can use magic, swear to serve him as subordinates. Thus, Ryouma begins his journey on the path of the supreme ruler.

“Live the life you want this time.”

A peerless assassin, codename: Hua, has already started her career ever since she was a child. Her mission’s record was perfect and whoever deemed to be her enemies would end up dead without knowing why.

When war ended, she was sent to an institution where she was watched heavily. The doctor in charge gave her an ordinary wuxia novel to read.

An avalanche struck after she had finished reading.

When she woke up, she had turned into Nan Hua, the young miss

At age 5, Amon unlocks the unique «Fury» genetics and is what caused his behavior to change.

After living with his grandparents for 11 years he learned to behave. For reasons he can’t know, his grandparents faked their deaths, and now he needed to move.

Now he would have to face a new challenge which was to live with his mother and stepfather and two twin sisters not linked by blood and go to school.