This is a series of Running Man's High School / College Alternate Universe which circles the life of Kwang Soo, the new transfer student, who finds himself in a love triangle between the school's two main powers, student president Jae Suk and the strongest athlete Jong Kook.  

What was, what could have been, meant more to her than anything else. As if two years didn't come between them, he stands in front of her. Where did we go wrong, Lee Kwang Soo?