The key is in G major.The phrase starts from bars 5-7 and repeats itself. The piece comprises of 2 short phrases and 1 long phrase ( chorus )
The harmonic function is mainly T-PD-D-T. There is the use of a suspension chord where the B note in the 4th chord of Gm is held to the 2nd chord of Gm ( marked by the asterisk ).
The composer moves gradually to Dm ( marked by the heart ). He uses chord 5 of the applied dominant. I believe he wants to emphasise the words of the song
