You're just a normal girl whom people used to describe as bubbly and cheerful. but now you've became cold towards others.. People have noticed the changes and tried to break the ice that was encasing your soul. But nobody was able to. What if... On a random day of the year, 12 boys that were admired by everyonce for their talent and looks entered the campus. They are 'EXO' Will they be able to break the ice? Or will the ice encase your soul forever?

To protect (actually, babysit) the most popular boy group of twelve gorgeous and flawless looking boys was their job. Get all the danger away from them, and make sure nothing happens to them. That was Girls' Generation's mission, as agents and spies. No affection and feelings must form during that period of time, but what will happen, when they suddenly fall for each other, and have to face their goodbyes once the mission finishes?