This is an advertisement for Caribbean Bay, a water park in South Korea.
It’s exactly what you would expect from an advertisement. It says it’s a hot summer and it’s about a girl and a guy getting closer in the heat. But it doesn’t forget to mention “Cabi”- Caribbean bay.
No dancing in this ad.
It’s pretty cute actually. Chansung, Taecyeon and Nichkhun of 2PM as well as Yuri, Yoona, and Seohyun of SNSD are lifegards at Caribbean Bay in training. They don’t want to talk to each other and refuse to fraternize, as it is looked down upon, but as the training goes on they start to fall in love, eventually each of them is partnered up. Taecyeon with Yoona, Nichkhun with Yuri, and (predictably) Seohyun and Chansung (both are the youngest of their group). In the end they all come together at a final party and have fun.
This is a good MV for male fans of SNSD and female fans of 2PM, as the guys of 2PM are completely shirtless and the girls of SNSD have basically training bras on. Eye candy no matter which group you’re looking at.
In the party scene the other dancers are members of 2PM and SNSD. They all dance the “Cabi Song” choreography together and have fun. Like I said, it’s kind of a cliche advertisement, but I like the little love stories, they add another dimension to the whole thing.