I think I am in love.
Just found out about this group, and they made my day.
If you have not heard of them, go check them out!

The band consists of:
Kang Ji Won/G-One (Guitar/Vocal)
Son Inho/Ino (Drums) <--- Reminds me of Dongwoo! ^.^
Lee Changha/Changha (Guitar)
Kang Jihoon/G-Hoon (Bass)

So different from the usual K-pop scene. K-Rock? Pop Rock? Punk?
The song is so catchy, it makes me wanna get up and dance!