He once said to her "Three years, give me three years, and I will give you a prosperous age"
But what does she have to do with the prosperous age after losing her memory?
Looking for the past but afraid of the past.
Wandering between "carrying the past" and "escaping in the present".
Where does the discrepancy between his memory and her memory come from?
Is she really the one he promised to three years ago?
What kind of existence is she?
People who seek the past, people who care about the present, people who see into the future... When the lives of many characters are intertwined, what kind of trade-offs should be made to get the best ending?