yulpiewsert1 the first one singing, is Sam Kim, the second one singing is Kwon Jinah, the third one it's Lee Jinah and then there's SeungHwan. They are all singers from a label called Antenna. They're all the younger ones in there so they have the nickname of Antenna Angels. They write their own music and help in the creation of their music, you should check them out.
Leisy Matos oh wowowow thank you so much! I really like their voices and stuff, glad to hear that they write and are active too. I'll check them out for sure