BTOB members attended their close friend and family member JOO's wedding.

On May 4, female solo singer JOO tied the knot with her non-celebrity boyfriend after dating him for about year. The wedding ceremony was held at a private location, attended only by their closest friends and family members. 

JOO, whose younger brother is Ilhoon, was congratulated by the BTOB members in a nuptial song. As seen previously, Ilhoon had participated in the wedding photoshoot, posing in a tuxedo with his sister. It has been stated that Ilhoon gladly welcomed his new brother-in-law to the family. 

Congratulations to JOO and her family!