What is love? How should we understand it? It is sacrifice, it is staying together, it is letting go, whether it can withstand the ordinary and fleeting years of seeing people's hearts, or whether it is tolerance, regardless of everything, it is easy to fall in love but difficult to get along with each other. Who uses years of waiting and searching to exchange for a promise that is thousands of years away? Perhaps, no one has thought about this matter, just following their own hearts and writing their own love. However, for this person who has been hiding from the world for thousands of years, perhaps it is time to understand...