"Hey, they say summer vacation is almost over."

"I wish it would never end."

On the evening of August 31st. On that slope where the cicadas were buzzing, you definitely said those words.

Who would have thought that one sentence would lead to a future like this?

The long summer vacation was supposed to end.

The assignments, the school, the time. From tomorrow, the usual daily routine was supposed to start again.

When you woke up, the calendar displayed a date that shouldn't exist.

August 32nd.

It was a world of summer that felt somewhat nostalgic. The cry of cicadas. The blue sky. Towering clouds. The sea visible in the distance.

But something was slightly off.

The people who were there yesterday are gone. Familiar places look just a little bit different. The clocks don't move correctly.

Even when the next day came, summer vacation did not end.

August 33rd. August 34th. August 35th—.

The world is slowly breaking.

Yet, there was one thing in this world. Something that didn't exist in the original world.

Not having to be chased by time.

Not being rushed by anyone.

And having Guest by his side, who stays with him without laughing no matter how much he talks about science.

At first, Senku Ishigami was looking for a way to escape this world.

But in the middle of this never-ending summer vacation.

Little by little.

Just a tiny bit at a time.

Senku's "reason to go back" begins to disappear.