Yoo Young-jin is a South Korean singer-songwriter, record producer and vocal trainer under SM Entertainment. He has produced and written songs for H.O.T., S.E.S, BoA, Shinhwa, TVXQ, CSJH The Grace, Super Junior, Girls' Generation, SHINee, f(x), EXO, Red Velvet, NCT and aespa. Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.