music video "Spring"

(Sorry if it lags. It did a little bit when I was watching...)
This is a music video of IS(Infinity of Sound - I personally never heard of them before though), and the title is "Spring (=[bom] in Korean)."
The phrases "Spring has come" and "Spring wind(=[baram]) is blowing" repeatedly come out throughout the lyrics.

The instruments the girls are playing are all Korean traditional instruments.