The old man is sorrow and she's drinking and dancing him away. The others in the video represent different emotions. She finally accepts and embraces her sorrow and seems to find a sense of peace with it. So pleased someone else sees this too.
Note: This is not a happy song!!! I loved this when I heard this song and thought it went well with the parts used from the Anime :) I suggest anda grab tissues if anda are an emotional kind of person :) Enjoy~ nyaa ^.^
