Hidden Ending Saengseong Jungimnida

After beating "The Return of the D-Rank Hunter," the game, Seon-Woo wakes up as the game's NPC, kidnapped by the insomnia-ridden protagonist Jae-Hwi, who demands Seon-Woo become his Mentalist via a one-sided contract. To return to reality, Seon-Woo must unlock the game’s secret ending. Will he make it?

(Source: Manta)