CNBLUE。2nd Single 日文單曲-- I don't know why * 附音樂 ... CNBLUE。2nd Single 日文單曲-- I don't know why * 附音樂，歌詞. 發行日期：2010-09-16 [曲目] 01. I don't know why 02. Lie 03. I don't know why (Instrumental)
