The rain stopped just before the final bell.

Yui went to the school rooftop to collect the towels she had forgotten. The concrete was wet, and the evening sky was broken into pieces inside the puddles.

Takumi came after her with a blank sheet of paper. “You forgot this in the classroom,” he said.

Yui pointed to the largest puddle. In the reflection, a paper airplane was falling through the sky.

Takumi looked up. There was no airplane above them. Only clouds, sunlight, and the fence.

“Maybe someone threw it earlier,” he said.

“Then why is your paper still flat?” Yui asked.

Takumi stared at the sheet in his hands. It had no folds.

The reflection changed. The paper airplane landed beside a blue flowerpot near the fence.

Yui walked to the pot and found a small note under it. The paper was dry, even though everything around it was wet.

Do not fold the first plane. Fold the second.

Takumi swallowed. “Second plane?”

Yui looked back at the puddle. Now it showed Takumi folding the paper while she laughed.

“Maybe tomorrow wants us to practice,” she said.

They left the rooftop without folding anything.

The next morning, a blank sheet of paper was waiting on Yui’s desk. It was already wet with rain that had not fallen yet.