Naho Takamiya’s very first day of her sophomore year of high school is off into an uncomfortable start. On the other hand, the correspondence is from herself10 years later on! Initially, Naho is doubtful of this notice; nonetheless, after seeing several occasions described to occur, she comprehends that the letter is in fact out of her 26-year-old self.The notice details that Naho’s future life is full of regrets, and that she expects her younger self can fix the errors which were created before. The letter warns her to keep a close watch on the new transfer student, Kakeru Naruse. Naho must be particularly cautious in making decisions between himas Kakeru isn’t about later on. Together with all the letter as her direct, Naho has the capacity to shield Kakeru before she comes to regret it .