In the days following the final Hashira Training arc episode, the Japanese animation industry’s online space was saturated with related discussion. Not only domestically. The overseas conversation was running at comparable volume across multiple markets simultaneously.

This particular quality of the Demon Slayer phenomenon had always been the detail that made Rei’s peers most uncomfortable. The cultural barriers between Eastern and Western entertainment markets were high and had historically been treated as structural facts rather than problems to be solved.

Global box office figures in the hundreds of billions were essentially nonexistent. Properties that achieved genuine popularity across all major regions simultaneously were not something the industry had frameworks for.

Shirogane had produced several of them.

In the overseas markets where the Infinity Castle arc film was releasing, February was a quiet theatrical period with minimal competition. The domestic spring holiday season was genuinely contested, with six significant productions competing for the same audience across the same window. Overseas, Demon Slayer was arriving into open space.

On February 17th, the opening day of the spring holiday theatrical season, the first-day screening allocation for Demon Slayer: Kimetsu no Yaiba had reached 26 percent, the highest of any film in the period.

Second was the historical fantasy film Demon Subjugation, starring two Best Actor recipients and one Best Actress, with a production budget above 6 billion yen, allocated 23 percent of screens.

Third was the comedy mystery The Angry Suspect.

Every competing film had strong professional credentials and serious investment behind it. What none of them could demonstrate before opening day was market acceptance. That remained to be established through the audience’s actual decisions.

For the cinema chain managers making their allocation decisions, the relevant historical data point was clear. The previous July, when Demon Slayer’s popularity was considerably below its current level, the Mugen Train arc had generated a domestic theatrical total above 60 billion yen and a global combined total above 100 billion yen.

The Infinity Castle arc was arriving six months later, with a larger fan base, a longer accumulation period, and the specific momentum of a fifty-minute season finale that had functioned as the most effective promotional material the series had ever produced.

Public opinion in the spring holiday season market had already settled into a direction.

"The second Demon Slayer film will almost certainly take the spring holiday season box office championship. The final domestic total may push past 80 billion yen."

"The Demon Slayer manga tankōbon average sales per volume are approaching 40 million copies this winter, a new record in Japanese manga history. How does its theatrical release perform against that baseline?"

"Will Shirogane-sensei create another milestone in the film industry this spring holiday season? Last year’s Mugen Train arc finished second in the annual box office. Can the Infinity Castle arc take first?"

"The miracle of Japan’s animation industry. Can he extend that to Japan’s film industry as well?"

At the Yukishiro villa, with the New Year approaching and Shirogane Animation’s staff on holiday, Misaki was working from home, managing the residual operational tasks that did not pause for the calendar.

In her breaks she was reading the online commentary about Rei.

The current domestic situation had a specific texture to it. Her relationship with Rei was a genuine professional partnership with the warmth of several years of trust behind it.

Miyu’s relationship with Rei was something that had been clear to Misaki for a long time and had recently become clearer to everyone involved, moving in a direction that had not yet been formally acknowledged but was no longer particularly ambiguous either.

Rei had been spending the New Year at the Yukishiro household for several years running, and he was here now, watching Demon Slayer rebroadcast clips on the television with a cup of tea.

"You did not spend the weeks before the New Year traveling the country for promotional appearances this time," Miyu said, looking at him from across the room with a slight smile.

"Nobody is born a workaholic. Seven years of this. It is time to enjoy the result," Rei said. "And at this point, whether I attend individual promotional events is marginal. The momentum of the film does not require my personal presence at each stop."

Miyu tucked a strand of hair back and looked at him with something that was not quite envy but adjacent to it.

"Only you could say that with a straight face. When my own work gets a tankōbon release or an adaptation announcement, I am nervous for weeks. The fear of poor results does not go away just because the prior results were good."

"Touch of Glass has been ranked third in Dream Comic for over a dozen consecutive issues," Rei said, with genuine puzzlement. "What is there to be nervous about?"

"You are the reason for that ranking and you know it. Every time a reporter asks which Japanese manga you are currently reading, you name Touch of Glass first. You are using your promotional reach to drive traffic to my work."

"Helping a friend is one thing. But I read your manga every week regardless."

Miyu looked at him with a specific expression.

Rei then proceeded to accurately summarise the content of the Mirror Bug Chapter from the previous day’s Dream Comic issue. In detail.

Miyu’s eyes went slightly wide. 𝕗𝗿𝕖𝐞𝐰𝗲𝕓𝐧𝕠𝕧𝗲𝐥.𝚌𝐨𝚖

"You actually read it seriously."

"Of course. To understand a person, the best way is to understand their work. Essays, paintings, novels, manga. The work tells you things the person will not say directly."

Miyu’s ears went red quickly and stayed that way.

Misaki, sitting nearby with her laptop open, had reached her limit. These two had been moving in a specific direction for months and had not yet formally arrived there, and they were conducting this particular conversation in her living room as though she were a piece of furniture.

She coughed once.

"Neither of us is questioning your abilities at this point. When your works were being dismissed by everyone around you, they still staged turnarounds. The Infinity Castle arc is arriving with the full support of the market before it has even opened. I imagine everything is proceeding within the range you anticipated."

Rei paused at this.

The honest answer was more complicated than Misaki’s framing suggested.

On a script level, the first Infinity Castle arc film was not at the same standard as the Mugen Train arc. This was not a failure of the source material’s quality. It was a structural problem inherent to the Infinity Castle arc’s plot design.

Three major battles running simultaneously: Shinobu Kocho against Doma, Zenitsu against his former senior, Tanjiro and Giyu together against Akaza. Each of these was exceptional material individually.

Compressed into a single film, the result was a narrative that moved between all three without being able to give any one of them the space it deserved.

The flashback sequences were distributed across three separate character histories, each introducing new figures the audience had not previously met, and the combined information density was higher than any prior Demon Slayer film had asked its audience to manage.

The Mugen Train arc had been structurally clean. A single threat, a single central relationship, one sustained emotional arc from beginning to end. The Infinity Castle arc part one was the opposite of that.

The extended production timeline and the promotional investment could compensate for some of this. The visual standard Illumination Production Company was capable of producing at full capacity could compensate for more. Whether the compensation was sufficient to match the Mugen Train arc’s reception, Rei genuinely could not predict with confidence.

That the Infinity Castle arc film would outperform the Mugen Train arc’s box office was a high-probability outcome regardless. The audience was larger, the anticipation was deeper, and the market conditions were more favourable.

"What are your work arrangements after Demon Slayer concludes? To be honest, even as CEO of Shirogane Animation, I do not have a clear picture of everything you have planned with Illumination Production Company."

"Nothing to hide," Rei said, after a pause.

"This year the company has five works in production simultaneously, so the schedule is tight. Nothing launches on television in April. But in May, looking at the current production progress, Attack on Titan should be ready."

"After the New Year I start getting serious about drawing the Titan manga. My arrangement with Dream Comic cannot be suspended too long. If it goes dark for an extended period the journal’s circulation suffers too much."

"May?" Miyu’s eyes went wide. "The Titan project was only initiated last August or September. That is less than nine months of production time."

"It is a tight schedule. The quality impact is manageable. The people working at full capacity to make it happen deserve serious respect, and the only thing I can offer them in return is compensation."

He continued.

"And the television launch in May is not the only thing. In July or August, the Your Name film releases theatrically. I intended to go through all of this with Misaki after the New Year, but since you asked. Enjoy the spring holiday first. We handle the specifics afterward."

Miyu sat with the timeline for a moment.

"Why do you release everything so quickly?"

"Probably because," Rei said, with a slight smile, "my creative desire is strong enough that I do not have time to become precious about the details."

The honest answer underneath that was simpler. Almost every week or two, something from his previous life surfaced in his memory with enough clarity to work from. If he was not actively choosing to be idle, there was no version of his schedule that moved slowly.

May: Attack on Titan anime begins broadcasting.

July to August: Your Name theatrical release.

And somewhere in the surrounding months, Higurashi: When They Cry, Summer Time Rendering, and No Game No Life would each need their launch windows determined.

Misaki exhaled slowly from across the room.

Next year is going to be busy again, she thought, and said nothing.