Slave Harem in the Labyrinth of the Other World - Chapter 168

In regards to the MMORPG Cross Reverie, Sakamoto Takuma boasted an overwhelming strength that was enough for him to be called the Demon King by the other players. One day, he gets summoned to another world with his appearance in the game. There, there are two people that insist “I am the real summon master.” Takuma gets slave-turning magic used for summoned beasts cast on him by the girls –

Somewhere in the wilderness. As soon as Ruan Youqing cleared up the gangsters, he turned around and saw Mr. Shoufu who came behind him. Throwing away the meteor hammer he picked up casually, Ruan Youqing fell into his arms by coincidence.

Ruan Youqing looked shy: “If Master Shoufu hadn’t arrived in time, you Qing would have been in trouble.”

Ignoring the screams and wailing next to his ears, Master Shoufu who did nothing stretched out his hand to wipe off the blood on the girl’s face, Then he said without changing his face: “The world is getting worse, people’s hearts are not old. Miss Ruan still has to be careful in the future, after all…you are too weak.”

The gangsters: “…???”

- Description from novelbuddy

He is a young man without a spirit root. It is believed that this denies him the chance at cultivation. However, a mysterious lady imparts a Supreme Demon Classic to him and from then on, he starts his path of cultivation.
He undergoes a total transformation to emerge as the most fearsome and powerful fiendish demon in his era, that even immortals and fiends are fearful of him, and saints are at his beck and call.
Mastering the Supreme Demon Classic is the turning point in his life. He is able to unleash his immense and divine power from within, illuminating the entire universe!

A striking man of mysterious origin and peerless talent, he looks back at the world, in all its entirety, with utter disdain. And yet, in the treacherous and unpredictable ultimate formation of the Boundless Secular World, he guards a breathtaking ancient qin with broken strings, waiting silently for the destined one to arrive!