Love that can overcome both distance and the passage of time. This is a bright, touching story with a happy ending that will support you on difficult days. Everything changes when Jun receives a mysterious letter from the future and learns that in his day only 23 hours exist. Only his classmate Hyeobin can help—her day lasts 25 hours. But how can Jun get back the missing minutes, because of which his life constantly goes off track? It seems the only way is to spend as much time as possible with Hyeobin. And what begins as forced friendship unexpectedly grows into something more—changing not only their present, but also their future.