As she progresses through the letter , she learns that Kakeru does n't bring any lunch to school and that her future self regrets never making lunch for him .
Naho continues reading the letter , learning that Kakeru will die soon .
As Naho progresses through the letter , Naho learns that Kakeru does n't bring any lunch to school and that Naho 's future self regrets never making lunch for him .
Naho continues reading the letter , learning that Kakeru will die soon .