Fireworks

In the town of Moshimo, Norimichi Shimada and his friends, Yusuke, Miura and Jun'ichi live while harassing their teacher and the former half galvanising over the beauty of their classmate Nazuna Oikawa. Yusuke in particular speaks of confessing to Nazuna. However, Nazuna is poised to leave town. While not knowing this, the four make a bet regarding whether or not Fireworks look round or flat from the side. Read more on Wikipedia.