To learn 結城アイラ - A Promise chords, focus on the sequence of these chords: Eb, Bb, Eb, Bb, Cm, Gbm, E, Ebm, Abm and E. Ease into the song by practicing at 45 BPM before reaching the track's full tempo of 91 BPM. To match your vocal range and chord inclination, adjust the capo in line with the key: Bb Major.