It’s the spring of Naho’s second year in high school, and Naho receives a letter from herself, 10 years in the future. The letter accurately depicts what’s about to happen, including details on a transfer student from Tokyo, Kakeru Naruse, who ends up sitting beside her in class. On top of that, the letter also begs Naho not to invite Kakeru out with her group of friends on that day alone, but why?
In this letter, I'll chronicle the events that are about 
to happen and the choices I want you to make, 
so you don't repeat my mistakes.
في هذه الرسالة، سأعطيك وقائع الأحداث التي على وشك
 ،الحدوث والخيارات التي أريدكِ أن تصنعينها
 .لكي لا تعيدي أخطائي
Damit sich meine Fehler nicht wiederholen,
schreibe ich dir, was passiert
und wie du dich entscheiden musst.
В этом письме я расскажу о грядущих событиях и выборе, 
который ты должна сделать, чтобы не повторить мои ошибки.