I am not that into K-Pop but I really like
Loveholics (reminds me of An Cafe's Candy Holic XD)
Their album
In The Air is amazing^^
It's different from the popular K-Pop bands like Kara, Wondergirls
This is the first song of them which I heard and I fell in love with it
Loveholics-아픔 (Play Chang Eun Ah)
(btw I didn't watch the PV so I am not sure if it's good
btw II I noticed that you also listen to An Cafe and LM.C, that's awesome 
)