Sungmin has written a song (lyric written & music composer) for a site of his Dad's company's service. This is a song for the site "sendbill" (http://www.sendbill.co.kr/service) which belongs to "Netmania" (http://www.netmania.co.kr/service), an e-business company/group that Sungmin's Dad Lee Chunhwa established since 1998.
The song is sung by Sungmin, Kyuhyun and Ryeowook.
You can listen to the song here
source : http://news.naver.com/main/read.nhn?mode=LSD&mid=sec&sid1=101&oid=014&aid=0002169403 (thanks Alice for the shout out), netmania's official site
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