What is Himitsu no Echo Box about?

Himitsu no Echo Box is a manga.

Is Himitsu no Echo Box still ongoing?

Himitsu no Echo Box is currently finished.

FINISHEDMANGA

ひみつのエコーボックス

Story & Art

What is Himitsu no Echo Box about?: Himitsu no Echo Box is a manga.
Is Himitsu no Echo Box still ongoing?: Himitsu no Echo Box is currently finished.