Dreams are curious things. Sometimes they are carried in notebooks. Sometimes in promises made beneath fireworks. Sometimes in the quiet belief of someone who refuses to let them die. If The Electric Boy was about lighting the first spark, The Mysteries of the Catalog is about protecting it from the wind.

Kihachi Sakamoto and Inako Momokawa stand on opposite sides of the same question. One has spent years learning how not to believe. The other has made believing an art form. Somewhere between them lies Seiroku's dream of an Age of Electricity—a future that seems to belong to everyone and no one at the same time.

Because the catalog is no longer just a catalog.

To Kihachi, it is the last piece of his brother he has left behind. To Yosuke, it is a promise waiting to be fulfilled. To Inako, it is proof that impossible things simply have not happened yet. And perhaps that is what makes Episode 2 of Sparks of Tomorrow so quietly beautiful.

Beneath the flying machines, rooftop escapes, and steam-filled streets, Sparks of Tomorrow tells a story about faith—not as certainty, but as choice. The choice to trust. The choice to hope. The choice to keep reaching for tomorrow, even when all you can see today is smoke.

Episode 2, The Mysteries of the Catalog, wastes no time picking up from its hilarious cliffhanger, with Yosuke realizing that the person he embraced through the cloud of steam was Kihachi, not Inako. The comedy quickly gives way to conflict as Yosuke confirms that he is, in fact, Inako's fiancé after receiving her father's blessing. Inako refuses the marriage without hesitation, repeating her answer until Yosuke's composure finally cracks. His obsession, however, extends beyond Inako. The moment he spots the Electrical Catalog in her hands, he lunges for it.

Kihachi intervenes, triggering a scuffle that destroys his carefully built projection device. For Kihachi, the machine is more than scrap metal—it is another fragment of the dream he shared with Seiroku. Fueled by grief and anger, he retaliates with one of his electrical inventions, shocking Yosuke and proving once again that electricity is not merely a fantasy in this world. Before he can do anything else, Yosuke's loyal bodyguard, Izo, overpowers him and carries Inako away.

The chase that follows reveals another fascinating aspect of the series' alternate history. Damaged steam pipes are enough to redirect traffic because the Mizoe Firm effectively controls the city's steam infrastructure. In a society dependent on steam, power belongs not to governments alone but to those who own the machines that keep civilization running. Amid the chaos, the precious Electrical Catalog appears to fall into a river, prompting both Yosuke and Kengo Kuga to dive in after it. Believing the notebook lost, Kihachi returns home devastated, convinced that the final connection to Seiroku has slipped away forever. Fortunately, Sparks of Tomorrow loves rewarding faith.

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Unknown to everyone else, Inako had anticipated Yosuke's greed. She secretly hid the real catalog and allowed only an empty box to fall into the river. Locked away in her family's storehouse after defying her father, she still convinces herself that he will eventually understand her decision. Even here, Inako refuses to surrender hope.

Guided by Inako's pet fox, Inari, Kihachi finds her hidden away. It is a wonderfully quiet sequence that slows the pace after the earlier chaos. While Kihachi initially comes looking only for answers about the catalog, their conversation gradually reveals something deeper. He recounts the promise Seiroku made years ago, that the twentieth century would belong to electricity—and admits that every strange vision of futuristic inventions has haunted him ever since. Yet beneath those memories lies resentment. To Kihachi, Seiroku broke the one promise that mattered by leaving for war and never returning.

When Inako finally returns the catalog, Kihachi is stunned. Instead of relief, however, suspicion takes over. The notebook is torn in half, and he cannot understand why Seiroku would ever entrust something so precious to Noriko instead of him. Every explanation only creates another question. Why did Seiroku know Noriko? Why leave the catalog behind? Why never come back?

Inako's response perfectly captures the philosophy that continues to shape the series.

"Believing in one another is what protects the bonds of humanity."

Unlike Kihachi, she refuses to let doubt become stronger than trust. Every time he searches for proof, Inako simply chooses belief. It is this contrast that makes their dynamic so compelling. Kihachi's skepticism is understandable, born from grief and abandonment. Inako's optimism, meanwhile, is not ignorance but a conscious decision to believe in people despite the possibility of being hurt.

Their relationship takes another meaningful step forward when Kihachi asks whether she truly intends to marry Yosuke. At first, Inako repeats what everyone expects of her—that she has no choice because her father has already decided. But when Kihachi asks what she wants, the answer changes. Quietly, she admits she does not want the marriage at all. Without another word, Kihachi reaches out his hand, affectionately calling her "the bug," and helps her escape.

Elsewhere, another mystery quietly unfolds. Kengo and Yosuke clearly share a complicated past, while Yosuke's obsession with the catalog grows even stronger. Despite claiming the notebook has no value anymore, his conversations repeatedly hint that he and Seiroku once dreamed of creating the Age of Electricity together. The audience is left wondering whether Yosuke's ambitions stem from greed, admiration, or heartbreak.

The episode's emotional high point arrives during Kihachi and Inako's rooftop escape. Nervous about testing his homemade flying machine, Kihachi hesitates until Inako gently hugs him from behind and whispers the words that have slowly become the driving force behind his inventions:

"I believe in you." For perhaps the first time since Seiroku disappeared, someone believes in Kihachi without asking for anything in return.

Their flight above Kyoto is breathtaking. Kyoto Animation fills the sky with warm evening colors as the pair soar above rooftops, clouds, and streets far below. For a brief moment, the series allows both its characters and its audience to forget the burdens chasing them. Naturally, that peace cannot last.

The machine begins to fail, forcing the pair into a frantic escape while Yosuke accuses Kihachi of kidnapping his fiancée. During the pursuit, Inako sprains her ankle, and the two seek refuge inside a pitch-black building. Darkness has always terrified Kihachi, yet Inako calmly takes his hand and leads the way, explaining that she has nothing to fear because the Great God Akubi is protecting them. Whether that protection is real almost does not matter. Her faith gives Kihachi the courage he lacks.

Eventually, Kengo catches up with them, and the Electrical Catalog slips from Kihachi's pocket. The moment Kengo sees it, his expression changes. A brief flashback reveals that he, too, knew Seiroku, adding yet another layer to the mystery surrounding the older Sakamoto brother.

By the episode's end, the catalog returns to Yosuke's hands. Convinced that he is finally about to fulfill the dream he once shared with Seiroku, he eagerly opens its pages—only to find childish sketches instead of revolutionary inventions. As Seiroku's words echo in his mind, calling the catalog a great secret, Yosuke collapses in disbelief. For the first time, even the man who devoted years to finding it begins to wonder if the Electrical Catalog was nothing more than an elaborate lie.

If episode 1 was about lighting the first spark, episode 2 asks a far more difficult question: what keeps that spark alive once the darkness returns?

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How did you find episode 2 of Sparks of Tomorrow? Let us know in the comments.