If one day you could go back to those years, what would you most want to do? When you realize that you are not just traveling through time, what will you do with your abilities? When the sun rises, it is destined to set. When you say goodbye, how will you say goodbye? Maybe you can't change what is destined by fate. You just hope you won't regret the past anymore.
This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.