you and heeseung were childhood bestfriends since young, you guys have been always together no matter what situation you guys were in and even made a promise with each other that you guys are going to marry each other once you guys reached 25 years old but suddenly his family moved to another country without letting you know and he just left you alone without telling you the reason why. a few years later, his family finally moved back to their old house and his family visited your family's house