'RYAN' [단 둘이]“ Just two of us ”[Album Credit]Produce: Ryan IMMix&Master: Ryan IMCover Design: Skymin1. 단 둘이Compose: Ryan IMLyric: Ryan IMArrange: Ryan IMAll instrument: Ryan IMGuitar: 이건민Keyborad: 김하영Chorus: Ryan IMComputer Programming: Ryan IMRecord Engineer: So-Jeong Lee IMDigital Edit: So-Jeong Lee IM