How do we have to (Feat. Horan of Clazziquai)

1 In front of house (Feat.SatByeol)
2 How do we have to (Feat. Horan of Clazziquai)
3 Romantic winter (Feat. Kim Jin Ho of SG Wannabe)
4 Why we do this (Feat. Kim Chang Yeol, Yuri of Cool, Bizniz)
5 My friend (with Lee Juck, Kim Dong Ryul, Psy, Gill, Ryu Si Won, Kim Won Jun, Kim Jo Han)
6 Romantic winter (Alpen Gondola Mix)(Feat. Kim Jin Ho of SG Wannabe)