To start learning 天野月子 - 蝶 chords, delve into these chords sequence to get the song's feel: B, Gb, Abm, E, B, Gb, Ebm and E. To build a solid grasp, start slowly at 47 BPM and then match the original tempo of 94 BPM. Considering the song's key of B Major, position your capo to suit your vocal and chord preferences.