MTL - Way of the Devil - Chapter 13 Crouching three

Nanaya traveled to the Naruto world and survived the Uchiha genocide incident.As long as he sleeps, he can become stronger and invincible.After accumulating 60,000 hours of sleep, Nanaya opened the Sharingan and activated the ability of the Ice Fruit.Itachi: I didn't find his existence on the night of the extermination. Who is it?Sasuke: Nanaya, my Amaterasu's black flames can burn all visible objects, otherwise they won't go out.Next second!“What, Nanaya, you guy, actually froze my black flames.”Pain: That guy just slept for a second in the gap between Shinra Tensei, and the power to wake up is above me.Madara: I can't dance in front of that man.Kaguya Otsutsuki: My world of ice can't even live up to that sentence, ahhhhh!Uchiha Nanaya, with a pair of Mangekyo Sharingan, changes the past and reverses the future.

An ordinary (?) grandfather, Choi Chuntaek. In an effort to protect his granddaughter, he started the virtual reality game 'Arkstar.'

Then... he accidentally obtained a legendary class?

I’m not a gamer. In fact, I barely touched games—never had the time or interest.I’m a 23-year-old college dropout, part-time construction worker, and full-time avoider of adult responsibilities.That is, until my little sister nagged me into trying a romance simulation game called Echoes of the Crimson Throne.I played it. Liked it more than I expected. I even completed it.And the next thing I knew… I woke up inside the game.Not as the hero.Not even as a love interest.I was now the personal attendant of Alice Draken—the villainess, the Prince’s fiancée, and the iron-fisted Ruler of the North.A woman whose downfall was guaranteed... unless I do something about it.

This novel is about the young master of the Du clan, Du Shaofu, who was born with crippled veins and is unable to cultivate martial arts . After finding out about his situation from the clan while returning home he got hit by a lightning and a mysterious ‘first scripture’ appears and after studying for ten years he was able to mend his crippled veins together and starts his journey to glory.