Orange

In Matsumoto, Naho Takamiya, a second-year high school student, receives letters sent from herself 10 years into the future. Her future self asks her to prevent her "biggest regrets", which has something to do with the new transfer student from Tokyo, a boy named Kakeru Naruse. At first skeptical, Naho begins to believe the letters as they accurately predict events. When the letter asks her not to invite Kakeru to go out for the first day, Naho and her friends (Hiroto Suwa, Takako Chino, Saku Hagita and Azusa Murasaka) decide to invite him anyway. Kakeru ends up not attending school for the next two weeks. (Source: Wikipedia)