Choshinsei Official Website http://www.choshinsei.com

Official Twitter Accounts

Choshinsei_JP http://twitter.com/CHOSHINSEI_JP

Kim Sungje http://twitter.com/Sj861117sj
Kim Kwangsu http://twitter.com/anankwangdayo
Park Geonil http://twitter.com/geonil2
Song Jihyuk http://twitter.com/xornjsz1
Jung Yoonhak http://twitter.com/chyh12002
Yoon Sungmo http://twitter.com/Romeo2123/

Cafe Daum http://cafe.daum.net/quintuplet5

Jung Yoonhak Official Japanese Blog http://ameblo.jp/yoonhak/

Cyworld Accounts

Kim Sungje http://www.cyworld.com/sj861117
Kim Kwangsoo http://cyworld.com/lkbklkbkl
Jung Yoonhak http://www.cyworld.com/chyh1202/
Yoon Sungmo http://www.cyworld.com/younsungmo
Song Jihyuk http://www.cyworld.com/hunyong

Official Shop

http://choshinsei.com/officialshop/index.html