The Argument Episode 5

Ginjiro advises Seikichi to travel alone with Sora to test out more fireworks, but also to settle their differences. There they meet Tetsuju the Human Fuse, who views Sora as Princess Moonbeam, much to Seikichi's chagrin. The myth behind Princess Moonbeam is explained. Tetsuju believes that he will construct a firework cannon better and sooner than Seikichi. After stumbling upon Tetsuju's cabin of firework cannons, Seikichi realizes how determined he must be to build a firework cannon, all when Tetsuju launches his own into the sky.