"[OFFICIAL] NCT U's Doyoung Debut Teaser Image" #DOYOUNG #NCT #NCTU #SMTOWN . . Doyoung is graduated from SMROOKIES Application now! And he will be the members of NCT project in the first unit 'NCT U'. . Congratulations! Kim Doyoung finally you're one of smtown artist. . . [INFO] Next teaser will be release on April 7th at 12.00pm."