This song uses chord progression that walks on top itself... the Bass stays the same while the higher notes walk down in a chromatic pattern. G, F#, D and C or a I, VII, V, IV. This was not written with a guitar in mind but the chords just seemed to want a guitar sound. I used two different pianos. The lower one for the "male" voice and the higher one for the "female" and I think it turned out nice.