They met for the first time when they were 11 years old, and they entered each other's lives from the first sight. With each other's agreement and longing for the future, she would spend 6 years going to the city where he lived to go to the same university with him. Six years later, when she came to the agreed city, he disappeared... Can the agreement between childhood sweethearts be fulfilled? How many more stories and entanglements will she have with him? After hurting each other so much, will they still be together in the end?