To learn Sunmi - (선미, 주인공) Heroine chords, anchor your practice on these foundational sequence of chords - G, D, G, Em, C, G, Am, Bm, Em, C and D. Set your pace at 61 BPM initially and then sync up with the song's BPM of 122. Tune your capo to accommodate your vocal range, referencing the song's key: G Major.