Studio Sigma (스튜디오 시그마)

The story delves into the life of Kim Seon-woo, who got pulled into a famous novel and decided to live a quiet life as a side character. One day, the protagonist of said novel died… “Do you expect me to believe this?” He ends up regressing back in time – back to his first day within the novel.

Waking up as the main villain of his own novel was not part of the original plan. Now a lowly level 10 assassin, Ganghu Shin must use all of his prior knowledge as the author to navigate the fantasy world he created himself, and somehow alter the ending in order to return to the real world. Can he change the outcome and defeat the "real" villain to prevent his own demise and save this world from impending doom?