she's saying there are clear days and rainy days every year, and in bad times you should try forcing a big smile and laughter until you are in a better mood.
This is Oriental Radio. Their most famous comedy bit is the 'buyuuden' ("legendary tale"). They've changed it to make a commercial for crab and mayonnaise pizza.
For example, the first joke is:
At-chan: One winter I ordered crab mayo pizza ten times.
if you don't speak Japanese, this video is about Tokui's (he's on the left) imaginary daughter and how he will talk to her when she starts wearing a bra. i blogged about it.
she's saying there are clear days and rainy days every year, and in bad times you should try forcing a big smile and laughter until you are in a better mood.
and then she gives a demonstration.