Rapper and songwriter for the South Korean boy band Topp Dogg. He and it's nine other members have released several successful albums since their debut in 2013. He later became better known as Sanggyun when he performed with JBJ and JBJ95.
He became a trainee at JYP Entertainment in his second year of high school.
A skilled dancer, he was previously a backup dancer for the group Evol.
His real name is Kim Sang Gyun.