What is the title of the son-in-law's ending song?

Album: the theme song and ending set of son-in-law difficult

You must find a way to love her.

To please her mother.

Keep an eye on her dad

Go to her house to be a cow and horse.

Laugh into a flower on your face

She learned to tell jokes when she was in love.

Happiness is happiness with her.

Happiness is happiness with her.

Happiness is happiness with her.

Even in a storm.

Happiness is happiness with her.

Until the white hair disappears