Full credit to this goes to http://ongaku4u.tumblr.com/ for this tab. it's a really good 
tab and I really wanted to share it on Ultimate Guitar because UG needs more kpop tabs

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Intro, verse, chorus:
F#m C#7/G# F#m/A F#7/A# 
Bm7 D/E AM7
Bm7 C#7 F#m Bm7 DM7 C#7 
F#m C#7

Bridge:
DM7 E/D C#m F#m
DM7 E/D C#m F#sus4 F#

Then repeat choruses ^^

Simplified version:

Intro, verse, chorus:
F#m C# F#m F#7 Bm E A
Bm C# F#m Bm D C# F#m C#

Bridge:
D E C#m F#m
D E C#m F#m F#