This is the first Thai series where I have seen Mild and Pluem... and since then I started to follow all their series and projects... I feel blessed having watched this series... I couldn't count how much I cried while watching it. For some drama series, you can easily carried away with the emotions and acting skills by / of the actors with pure entertainment alone... with this, in Happy Birthday you know you are learning the lessons of life... you know you are crying not because you are being entertained...