Artist: LOOΠΔ 1/3 (the first 4 members)
Song: Love&Live
MonoTree
BlockBerryCreative

More LOOΠΔ groupings:
HeeJin & HyunJin – I’ll Be There
HeeJin, HyunJin, HaSeul – The Carol
HeeJin & HyunJin – My Sunday
HaSeul & YeoJin – My Melody

Maybe Check Out?