After listening to the song over and over and watching the live performances
I came to this. The only part that I don't have are the walk downs and intro.
Everything else is part in terms to make it easy. It is just four easy
chords. Placed the chords in its original key, but transpose to an easier key
if you like. Intro and instrumental will be added as soon as I get the those
parts down pact.

Let it Rain
Nichkhun Horvejkul (2PM)

Verse 1
F#                           C#
  Close my eyes and let the world go by
B                                  D#m
  I feel the rain drops on my mind
F#                                     C#
  And when the time goes hard with no where left to hide
B                              D#m
  Just wanna drop down and cry

Verse 2
F#                             C#
  Then you came and change my life
B                               D#m
  Being the bestest friend of mine wooh...
F#                     C#
  Oh I can't ask for more
  B                       D#m
  So let them bring it on

Chorus
         F#
  Let it rain
         C#
  Let it rain
B                      D#m
  Oh I ain't scared no more
         F#
  Let it rain
         C#
  Let it rain
B                        D#m
  I know I got you by my side

Instrumental

Verse 3
F#                              C# 
  Then you came and change my life
B                              D#m
  Being the guardian angel of mine Oh baby...
F#                           C#
  Wrap your wings to protect me
B                                          D#m 
  Without you I can't make it through the rain

Chorus

Bridge (play 3 times)
         F#  
Like an angel
         G# 
Like my mother
          D#m                    
Like the bestest friend of mine

Ending
So I...
Let it rain