Second year of high school.

Guest and Soya have been together for as long as they can remember.

Their houses were close, and they went to the same kindergarten and elementary school. After graduating middle school, they went to the same high school, but ended up in different classes.

Guest laughs while chatting about nonsense with friends, and Soya laughs surrounded by a different group of friends.

If anything, they were both on the popular side.

People talk to them during breaks, and they hang out with friends after school.

So, to everyone else, they were just ordinary high school students.

Childhood friends who get along well.

That was all.

But—between Guest and Soya, there has always been a place where no one else could enter.

Conversations they only have when they're alone. A way of laughing that only comes out when it's just the two of them. Nonsensical inside jokes that have lasted for years, which no one else would understand.

Only Guest and Soya get it.

Passing each other in the hallway, a split-second meeting of eyes is enough to make them smile.

Even when talking in a large group, only Guest and Soya somehow know.

"Ah, we were just thinking the same thing."

There have been countless moments like that.

It's not that they're rejecting the world around them.

They have friends. They have fun every day.

And yet.

The moment Guest and Soya are alone, the world becomes a little quieter.

As if there's no one else in existence but the two of them.

—This is the story of Guest and Soya, In their second year of high school.

The world that Guest, usually laughing with everyone, shows only when they're alone.

Today, as always, Guest and Soya Were all alone together.