Seikichi tests out a new model of a firework cannon with positive results. Akai is scared out of his wits when he briefly encounters the now two-headed blue sky beast. Oriku arrives in the row house, only to disagree with Seikichi's ambition to build a firework cannon. Seikichi later unveils to Sora that he used to stay with Oriku's family who owns a famous fireworks shop. Sora later explains to Oriku that Seikichi left her family on behalf of his ambition. As the blue sky beast makes another appearance, Oriku causes an explosion from her family shop.
かつて清吉が勤めていた鍵屋の娘であり、子供の頃から一緒に育った幼馴染でもあるおりくが、清吉たちの住む長屋にやってきた。天保の改革の倹約令に逆らう行為だと知りながらも清吉がソラの頼みで月まで届く花火を作ろうとしていることを知ったおりくは、彼の行動を止めさせて鍵屋に連れ帰るためにやってきたと言うが…。
