They are called IMGL and they have four members, who are all super cute<3 THEY ARE UNDERAPPRICIATED HENCE THE MAKING OF THIS POST!!
The members names are:
Chang Hoon. He is the Vocalist!
Su Hyun. He is the Guitar!
Dong Hwan. He is the Bass!
Jae Hoon. He is the Drums!
If you haven't heard them definitely give them a listen. I love rock music and maybe that is why I am so fond of them but yeah... Listen to them! XD