Which kpop song had a music video like this?

For the life of me, I cannot remember which song had a music video like this... It's recent, maybe in the last 1-3 years.

The music video is of a guy betting with his friend that he'll be able to get this girl they meet at a concert; the guy and girl shares some beers (I think the guy drops a bear can top into her drink). He later buys her a whole ton of expensive stuff to show off he has a lot of money but she thinks they're crap.

Music video ends with her walking up to him, dumps him, gets money from his friends, and walks off but with her back to him, it shows that she still has the bear can top from the beginning of the music video.

The song is sung by a girl(several girls?)

That's all I remember... argh....