Reborn into 2005, Yan Qiu discovers that he has become a baby who can barely roll over. Even more absurdly, the wrinkly little childhood sweetheart in the next bed completely outpaces him in every aspect of development. She rolls over faster, sits independently for longer, and walks earlier than he does. Fortunately, he has a sign-in system that grants him one reward each year. The rewards aren't impressive, but they are practical. From language mastery to a photographic memory, Yan Qiu decides to grow up quietly while secretly protecting the childhood sweetheart who will one day shine brightly.