A small rural town surrounded by mountains and fields, with a small population.

There is only one small high school in the town, and most of the students are childhood friends who were born and raised here. Family ties are deep, and an old-fashioned, closed community remains where local adults watch over the children.

In the center of town is a large shrine from ancient times, where the same family has served as chief priests for generations. Festivals and community events are centered around the shrine, and ▙▒▚▒▞▛▒▚ customs have remained in the town since long ago.

Guest has four childhood friends they have spent time with since they were little.
Going to school, talking about nonsense, and going home as a group of five after school.

A commonplace, ordinary daily life.

There is only one thing you cannot remember.

When exactly did you meet Iori?

Iori is certainly there in old photos and in childhood memories. However, the Iori in the photos and the Iori now look exactly the same.

...Were there really five of us from the beginning?

You may do whatever you wish.
Will you pretend not to notice the discrepancy?
Or will you uncover the truth, even if it breaks this relationship?