Youngbae and Ah Jung were inseperable childhood friends. Or so they thought until Youngbae moved away. But him moving away was not going to stop them from being with each other. Youngbae promised Ah Jung that he'll come back for her one day. When that day comes will they be able to recognize each other? Will they even remember their childhood promise? Will they even remeber that they even existed, or let only liked each other?