Magika no Kenshi to Shoukan Maou - 1.2.2 — The Witchs House

Lingyun, a fierce and savage cultivation genius takes over a dead teenager’s body. Coincidentally, they are both named Lingyun. Set in a alternate version of the 21st century, teenager Lingyun has been killed by someone with a grudge.

- Description from Novelupdates

In an era when the power of Fire Magic was considered to have reached its limit, one girl began researching nuclear fusion.

[Climb the Dimensional Tower and have any wish fulfilled by the gods themselves!]

Enters Josh Malum.

He was feared on Earth, but in this new world, he is but a Fallen. One that is forced to Climb. If it wasn’t bad enough already he is also Classless, something that is unheard of in the Tower. Yet none of it phases him.

«You think I should be despairing? Why? Is it because I’m classless? They offered me so many classes, I simply refused them all.»

Sacrificing the many worlds is a small price to regain what he once lost. To all the deities that stand in his way:

F… ⎧ᴿᴵᴾ⎫

Years ago, Earth was indoctrinated into the “System.”Earth was not the only place with the System, however. With the System came the other races, Invaders. The Invaders had one goal, to obtain ownership of this new habitable planet. This created a bloodbath, and for years the war raged.This didn't really have much to do with Derek. Derek was kind of a loner. Yeah, he enjoyed the occasional chat or drink with others, but he never stayed in one place too long or really got to know anybody new.Derek did happen to be rather strong. After the years of fighting monster and Invaders alone, he had become quite adept at surviving. One thing that helped keep him alive was his refusal to get involved with others. He rarely cooperated with teams.One day, Derek broke his rules and decided to lend some help, as the mission didn't seem too hard. He should have stuck to being alone.