Orange. Volume 3

Naho has despaired of saving Kakeru alone but learned that Suwa also received a letter from the future. Following the instructions, they notice that the gap between the impending future and the content of the letter is growing...
 
Backstory:
One day, high... school student Naho Takamiya receives a letter from herself from the future. It says: «I don’t want you to repeat my mistakes». The letter accurately predicts all events and asks to prevent a tragedy related to a boy named Kakeru Naruse.
For example, the letter asks Naho not to invite Kakeru to hang out after class, but she does not listen and invites Kakeru. During their walk, the boy's mother commits suicide. According to the mysterious message, Kakeru will also take his own life.
Kakeru and Naho grow closer, and the girl increasingly wants to change the future where Kakeru is no longer present.