This will seurely be a short one because I couldn't really find sooo much info about them but let's give it a try ^^

A'st1

Have you heard about them? O__o Well I haven't XD They're a 6-members group who debuted 2008 (That's a long time ago...) 
Ehm that's all I know...
Oh... -.- They disbanded 2009 *fail* Only 1 year?! o__o




It's so weird they give me a SS501, TVXQ and a tiny tiny bit TVXQ feeling... But most SS501! One of them even has a similiar voice just like Young Saeng...
They were pretty OK~



Almost as SHINee's Hello (The concept of the MV)

Park Jung Jin
Byun Jang Moon
Sung In Kyu
Lim Han Byul
Japanese member Tomo
Chinese member Haiming

Ha? Chinese and Japanese members... ê__ê
(They even sang the song "Yearning of the Heart" for the drama, Boys Over Flowers :O )