'Ryan Producing Album Gradation #2, Green = Seoul Bike Ttareungi' @ggyomoo @imaginemuzik Executive Produce : Ryan IM Cover Design : Soram Park Track.1 서울 자전거 따릉이(Kids' Version) Composed : Ryan IM Lyrics : Ryan IM Arranged : Ryan IM, 장영준 Vocal : 박 후 Piano : 장영준 Computer Programming : Ryan IM Digital Edit : Ryan IM Record Engineer : YuJin at Imagine Muzik Mix : KATCHY at Imagine Muzik Master : Ryan IM Track.2 서울 자전거 따릉이(Adult Version) Composed : Ryan IM Lyrics : Ryan IM Arranged : Ryan IM Piano : 장영준 Computer Programming : Ryan IM Digital Edit : Ryan IM Record Engineer : YuJin at Imagine Muzik Mix : KATCHY at Imagine Muzik Master : Ryan IM