[1] Prior to his debut, Brother Su participated in "Christmas Card from Real Collabo" with his remix of "Winter Wonderland".
The following years, Brother Su started featuring and writing for his label mates as well as other artists.
He produced label mate Siaena's "Sound of Rain" and Lovey's "Return", as well as Crucial Star's "Flat Shoes".
In February 2016, Brother Su along with K.Will, Junggigo, and Jooyoung released a special Valentine's song, "Cook for Love".
[citation needed] On April 24, 2023, Starship Entertainment announced that he will hold a wedding ceremony with singer-songwriter and lyricist Kim Jin-ah, who is three years his junior, on May 13 at a hotel in Jung-gu, Seoul.