I will explain later. watch this first.

Axiom 1: within acceptance, beyond expectation.

Despite the fact that this song is in the key of E minor, does this 4 bars of music sounded E minor for you? The truth is chorus begins in the tonal region of G major (or relative major of E minor). Its important to strategically prepare the music to flow into the designated place, while keeping the audience in suspense and not reveal the true content until the very last possible moment.
Pic 1
(Work in progress; it would be done eventually.)