Yesung ; Cinderella Sister OST

I heard this song through the speaker of the campus while I walk up to the training center.
It reminded me of the sad mood and pain of the drama 'Cinderella Sister'.
After 4 weeks here in TTP I feel  a little down and gloomy. I don't know why.
So I made up my mind to think in positive way, which will help me overcome this slump.