To learn 이달의 소녀 오드아이써클 - Loonatic chords, your first step should be understanding these chords - Bb, Dm, A, Gm, Dm, Am and F in sequence. A strategic approach would be to train at 75 BPM initially, and then accelerate to the song's tempo of 150. With an eye on the song's key D Minor, set the capo that best suits your vocal range.