There is a forest near my house of Yokohama. The brook flows there, and the fireflies live there and fly in the evening.
On the evening of June 8, I went to watch fireflies and made the video.
But the fireflies are small and show only the light of the firefly. Please watch screen of the videos well.
You do not watch the figure of a flying firefly and you watch only small lights.
However, you may understand the situation that fireflies were fling about in the voice that people are impressed by.