A week ater the blog I upoaded on June 27th, I took the first attached picture of the watermelon. Some small children in my neibourhood called it "watermelon butt." And now, one more week later, it looks like the second picture. It looks like two, but actually one melon.
By the way, there are some farmers who grow cubic watermelons in Japan. They grow them in hard boxes. The article in the newspaper says that they sell well as a novelty, not only in Japan but also abroad. I feel like buying one and inviting my friends to see it, but one melon costs more than 10,000yen(100 US dollars or 76 euro). That's way too expensive!!