Here are photos and short narratives in Korean from music.naver.com.
Naver Music also released 20 seconds greeting of Young Saeng on their website. You may click HERE to view.
Here's translation of Young Saeng's message lifted from the blog of Lois.
"Hello, I'm Young Saeng. I'll make a debut as a solo with my first solo Album 'Let It Go'. I'm very nervous to have a very first solo performance. So please encourage me and love my album 'Let It Go' a lot."