Back then, Heeseung belongs to the F4 the 4 handsome students in the campus, he met you because you bumped to his sports car, but when you two got close he once said "In the future...i want to marry you" Until the graduation day came, after he disappeared but one thing he said "Till we meet again...."

After many years have passed, you are now 25 which means you've graduated 3 years ago.

One day you were at a rooftop open resturant alone, suddenly someone tapped your shoulder