I just couldn't say, “I don't exist in this world anymore."

A single-minded college boy and a lonely young man with a secret.

When Kota was in elementary school, he met a boy named Rui during summer vacation in his father's countryside.

For Kota, Rui was his first love.

Now a university student, Kota meets Rui again, however, everything has changed drastically in the seven years since they did not meet.

This is a story of two people's fleeting summer in a quiet seaside town.