SSS-geup Teukseongeul Badatjiman Jeokdanghi Salgo Sipda

The world now swarms with supernatural beings called Celestials and the Awakened, people with newfound special powers. But none of this means anything to Yoo Sungwon, an ordinary man trying to live an ordinary life. Unfortunately for him, his peaceful days end when he gets a mysterious text and becomes a rare SSS-class knight with perks to die for. In order to avoid getting killed or targeted by those who want his powers for their own, Sungwon has no choice but to get stronger by leveling up.

(Source: Tapas)