Karo to Piyobupt: Ame no Hi Episode 1

Karo was hurrying to his house on a rainy day. Then he met a fish swimming in the air. He talked about the fish to Piyobupt but Piyobupt laughed at Karo. So they started to imagine and imagine. And outside of the window, flying fishes were enjoying the rain. (Source: Yamamura Animation)