I have memories of the future.

So said the unknown girl who appeared before Aruto Mozumi, a third-year high school student.

Aruto has lost both his childhood memories and the ability to hear piano sounds.

Meanwhile, his younger brother Tokio is blessed with a natural gift for piano.

Why is it that he alone cannot hear the sound of the piano?

Haunted by a vague anxiety, Aruto can't bring himself to confess his feelings to the classmate he has a crush on.

The final summer of high school.

The guidance of a girl with memories of the future begins to dramatically change Aruto's destiny.

A bittersweet and fleeting summer romance.

[Description taken from Steam]