Difficult to understand, is it a sad song or romantic? 3

 I hard this music as background music of some ADs. It is very energetic music and I liked it. I thought this must be a very happy song. When checked out its music video, I had to say, " Oh no!"

Not to show unhappiness

Sometimes, no matter now low you feel, no matter how dishearten or upset you are, you have to be happy (At least have to show) for your family members, especially for your kid, because if you are unhappy or rude then it will bring unhappy feeling to your kid too. Why will you let your life, ruin your kid’s one? They need a happy environment to grow properly. It's their right.