Executive Album Producer : Yellow Lights
Composed by : Yellow Lights
Lyrics by : Yellow Lights
Arranged by : Yellow Lights
1. 그땐 그게 사랑인 줄 몰랐어 (feat. Soundhills)
Vocal : 이현 (Soundhills)
Guitar : 차희찬 (Heechan Cha)
Bass : 정상욱 (Sang Out Jung)
Drum : 조득연 (Deukyeon Cho)
Pad : Yellow Lights
Recorded by : Yellow Lights, 이현 (Soundhills), 차희찬 (Heechan Cha), 정상욱 (Sang Out Jung), 조득연 (Deukyeon Cho)
Mixed & Mastered by : 이병석 (Byungseok Beau Lee)
Album Cover Art : 전지원 (Jiwon Jeon)
Music Video : 황필원 (Phil Won Hwang)
Cast : 유정하 (Jeongha Yoo), 구지은 (Jieun Koo)