A 26-year-old young woman whose career and life were not going well suddenly returned to her high school days overnight, and a nameless person who claimed to be in charge of her own time file said that everything was his fault. They needed to correct this mistake reasonably and strive to return to the original time and space as soon as possible... But is everything really that simple? What's the conspiracy behind the whole thing? What gains and changes will she make in the process...
Concept: Maybe everyone has thought about going back in time and making different choices, but can going back in time really change the facts? Is the time-travel itself voluntary?