Young K of DAY6 has released a music video teaser for 'Shut The Door,' the title track from his second studio album 'YOUNGEST.' JYP Entertainment unveiled the teaser on Young K's official SNS channels two days before his comeback on the 25th. The released teaser video showcases Young K during filming preparations and features his diverse charms, including deep contemplative acting and a carefree smile in a blue meadow. The ending scene where he opens a door and runs forward energetically heightens anticipation for the full music video. The title track 'Shut The Door,' which Young K composed and wrote lyrics for himself, is a song that candidly expresses his emotions in diary-like form, capturing moments of reassuring himself with the door closed. The second studio album 'YOUNGEST' includes 15 tracks including the title song, along with songs like 'Marionette,' 'F world,' 'Hey Honey,' and '응원가,' releasing on the 27th at 6 PM. This marks Young K's return approximately 2 years and 10 months after his first solo album 'Letters with notes' in September 2023. He will also hold the solo concert 'Young K Solo Tour〈YOUNGEST〉' at Incheon Inspire Arena from August 14-16, with all three concert dates selling out during the fanclub presale.