Everyone has a memory of an unrequited love. Most of the time, unrequited love ends in embarrassment. However, unrequited love isn't all that bad. It can be sweet, and it can make your heart flutter. There is a man who has been in love with a woman for a very long time. They aren't lovers nor are they just friends. After giving up his dream to become a track athlete, he couldn't go to college. He spent three years doing nothing and another three studying for the civil servant exam. Now, a week before her wedding, and he's in turmoil over the prospect of losing the woman he loves. He travels back and forth in time with the help of a mysterious manhole in order to gain the heart of the one he loves. However, each time he goes back in time and returns to the present, he realizes that the small changes he made changed his life in unexpected ways. How can he get the girl of his dreams and live a life that he's not ashamed of?