MTL - Business Manager - Chapter 1848 No virtue bowed his head

As a promise, he went out into the world as an assassin. 3 years later, after becoming the Supreme Assassin, he gave up on everything he had and returned to the ranks of ordinary people. But one day, Kismet, a mystical game created by the National Research and Development had appeared.

Enigmatic hands, spectral frame, and one cunning strike just like the swing of the Grim Reaper. The Supreme Assassin takes on the mystical world, and how his legendary tales sets off, progressively ascending the altar to becoming the best.

- Description from Novelupdates

“What should I do with your tantrums? I’m too busy right now to be by your side.” Well, since entering the dungeon, I hadn’t really paid proper attention to Cha Sahyeon due to being occupied with various things. It was a golden opportunity to make my face known by Kwon Taehyeok and Ryu Seonghyeon, the targets of the main quest, not to mention the unexpected participation of the Ronic Guild in the raid. Cha Sahyeon seemed to have caught my playful murmurs as his shoulders trembled. Eventually, I heard his subdued voice: “…Don’t go.” “What?” Leaning against my shoulder, Cha Sahyeon stared at me intensely. “Don’t go.” “…!” For a moment, a strange light seemed to flicker in Cha Sahyeon’s green eyes directed at me. Simultaneously, a loud notification sound echoed around us.

A girl who calls herself a demon appeared before a timid student named Fumio Kijima. The girl claims to be a campaign girl from the demon world and she gives him the ability to “summon a room” from nothing but thin air.

At first he doesn’t abuse his power and uses it as a convenient ability in his every day life. But one day he is bullied by his classmates under a false pretext and is made to suffer. In the past he would have wallowed in misery and cried himself to sleep, but now he had a power to call upon.

“I will make them regret it!”

Using his powers to summon his “room”, he begins his era of confinement and brainwashing to achieve his goals.