Gong Myung said, "NCT U's member Doyoung is my younger brother," then played the requested song, NCT U's "Without You" after which he said, "My brother really liked this song. Doyoung, we both live in Gangnam but we haven't been able to see each other lately. I miss you."
Aw... how cute. Hopefully, they can have a brother date soon!