YoungK (Kang Young-hyun), bassist and vocalist of DAY6, is an all-rounder who turned his initial inexperience into strength through sincerity. Before becoming a JYP trainee, he had no bass experience, yet became a prolific songwriter with over 200 registered copyrighted songs. His tracks like 'You Were Beautiful' and 'A Page For You' proved their timeless appeal by entering the top 10 of music charts in 2024, seven and five years after their respective releases. YoungK's lyrics excel at translating universal emotions into specific, relatable scenes using accessible language. On August 27th, he released his second solo regular album 'YOUNGEST,' where he participated in writing all 15 tracks, revealing previously hidden emotions including hurt, anger, and desire for freedom. The title track 'Shut The Door' stems from real experiences of being hurt by close people, showcasing his weariness and desire to be alone—contrasting with his previously wholesome image. This represents not a denial but an expansion of YoungK's humanity as a complete artist.