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?

As we all know, night and day can never coexist. Sowing and reaping are completely disparate. In the same way, an angel was never meant to fall in love with a mortal...