Orange is a touching age gap romance manga that tells the story of Naho Takamiya, a high school girl who receives a letter from her future self. The letter warns her about the regrets she will have if she doesn't change certain events in her life, particularly involving a new transfer student named Kakeru Naruse. As Naho tries to alter the future and prevent Kakeru's tragic fate, a deep bond forms between them. Orange explores themes of friendship, love, and the impact of our choices on our lives. With its emotional storytelling and beautiful artwork, this manga is a must-read for fans of age gap romance with a touch of time-travel.