Y Writing Yoo Gi-sung No biography available. ↗ Share Known For‹Mercy for None · 2025Mercy for None★ 7.92025SeriesAction & AdventureDramaAfter severing ties with his gang, a former gangster returns to uncover the truth behind his brother's death — embarking on a relentless path of revenge.▶+› FilmographySortPopularNewestTop ratedMercy for None · 2025Mercy for None★ 7.92025SeriesAction & AdventureDramaAfter severing ties with his gang, a former gangster returns to uncover the truth behind his brother's death — embarking on a relentless path of revenge.▶+Screenplay
