I can Use Filthy Game Skills In The Real World - Chapter 24 - : Mina!

Bad End Night is a novel by Hitoshizuku-P, based on a series of Vocaloid songs, the NighT Series. The plot revolves around eight actors trapped in a never-ending play, seeking a way to escape.

He Lang died by his own hands for the sake of his imperial younger brother’s ambition, whom he loved. He was offered to be reborn in exchange for giving up his past romantic feelings. Reborn without the burden of his romantic feelings, he brings with him a manual to new worlds. He wholeheartedly followed the instructions of the manual to complete the tasks, not knowing that the originally slag gong was blackening…
He pleaded to his affectionate Emperor brother to release him, he pleaded to the paranoid prisoner next door, but until the end he remained baffled.
In the end, he discovered that the full name of the manual was – “Slag Shou Cultivating Manual”
Σ (っ ° ° °;) っ!

- Description from Novelupdates

Climb the Tower.The path to power is ever growing, immeasurable. A peak above a peak, above a peak. There is always the next peak to look up to. A place where dragons eat dragons.In this world where a catastrophe known as “Global Awakening” gave humans different magical abilities to fight the dungeon and monsters that invade earth, Jael is among the weakest—one of the Half Awakened, struggling to survive through odd and humiliating jobs.However his dream of climbing the Dungeon Tower won't be forever buried because a WILL has been left behind. An intent put into a spellbook that's been waiting for just who to claim it.In this golden era of worlds, all eyes are on the Dungeon Tower, where everyone seeks to become its master. “What do you desire? Money and wealth? Honor and pride? Authority and power? Revenge? Do you want to reverse your failures? Or something beyond them all? Whatever you desire—it is here. If only you climb.”Follow Jael’s journey as he ascends the Dungeon Tower, determined to create a new legend for himself.