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?
April 6th: I forget to set my alarm clock,
and oversleep for the first time in my life.
السادس من أبريل: أنسى ضبط منبّهي
 .واستغرقت بالنوم لأوّل مرّة في حياتي
Wecker vergessen.
Habe das erste Mal in meinem Leben verschlafen.
6 de abril: Olvidaste poner el despertador
 y te quedaste dormida por primera vez.
6 de abril: Olvidaste poner el despertador
 y te quedaste dormida por primera vez.
Le 6 avril, 
J’ai oublié de mettre mon réveil 
et je me suis levée en retard 
pour la première fois de ma vie.
6 Aprile: Mi sono dimenticata di impostare la sveglia
e mi sono svegliata tardi per la prima volta nella mia vita.
[6 de abril]
Você se esqueceu de ligar o despertador e
 acordou atrasada pela primeira vez na vida.
Я забыла поставить будильник и впервые в жизни проспала.