A girl mysteriously receives advice from her future self and as a result her group of friends, along with a newly arrived, troubled classmate, learn how to be better friends and a better community.
In 2012, Atsuya and his 2 childhood friends do something bad and run into an old general store. They decide to stay there until the morning. Late into the night, Atsuya sees a letter in the mailbox. The letter is addressed to the Namiya General Store and the letter was written by someone to consult about worries. Incredibly, the letter was written 32 years ago. The mailbox is somehow connected to the year 1980. Atsuya and his friends decide to write a reply and place their letter in the mailbox.
Kako, a 16-year-old high school girl, goes to a mixer pretending to be 22. While there, she meets Kouta who at first has a very intimidating aura. But once he saves her from an awkward situation, she wants to know more about him as does he. That is until he finds out she isn't 22. The next day Kako runs into him again, but this time he's working as a police officer. Kako still wants to get closer to Kouta, but he isn't interested or is he?
