In the Demon Slayer World.
Inside the Insect Hashira—Kocho Shinobu's estate.
"Ah, so boring. Why haven't the videos on multiverse projection been very good lately?"
On a hospital bed, a blonde boy was currently looking at a translucent screen with a bored expression. Seeing Tanjiro and Hashibira Inosuke getting up to start their rehabilitation training, he quickly said, "Tanjiro, Inosuke, do you have any good video recommendations?"
"Zenitsu, there's no time to rest now. We need to do rehabilitation training; we don't have time to watch videos."
Tanjiro, who had just gotten up, was helpless. Today was their first day participating in functional recovery training.
Since the battle at Mount Natagumo, all three of them had been seriously injured. Of course, the most seriously injured was naturally the blonde boy who spoke first.
His name was Agatsuma Zenitsu. Because of that battle at Mount Natagumo, he had been bitten by a poisonous spider and almost turned into one himself.
Tanjiro and Inosuke's injuries had mostly recovered, so they had to participate in functional recovery training.
Zenitsu, on the other hand, needed a few more days before he could participate.
Although the videos on multiverse projection were very good, they were members of the Demon Slayer Corps and couldn't afford to be so lazy.
"..."
Inosuke didn't speak. He was wearing a boar head mask, making it impossible to tell what expression he had.
"Ding-dong~"
At that moment, a strange sound rang out. Agatsuma Zenitsu looked at the translucent screen with a puzzled expression. A 'Highly Recommended' video?
Since when did multiverse projection have this feature???
Though confused, Agatsuma Zenitsu clicked on it anyway.
"Inventory? Omni-Anime Top Ten High-Octane Scenes??" Agatsuma Zenitsu looked on with doubt, then he suddenly thought of something and said excitedly, "I don't know what it means, but it seems like it could be interesting."
"Tanjiro, Inosuke, you guys come take a look too. It'll only take a moment anyway."
As he spoke, Agatsuma Zenitsu sent the video to Tanjiro and Inosuke.
Actually, he didn't even need to forward it, because the two of them had also received the video push and could see the message immediately.
"A high-octane video?" Tanjiro also sat on the bed, clearly quite interested in this video.
It wouldn't take long to watch a video anyway, so he might as well take a look.
Inosuke was the same. They sat down and watched the video together.
It wasn't just them; in the Demon Slayer World, many people [and demons] had received this news.
"Special recommendation? Omni-Anime Top Ten High-Octane Scenes? It seems quite interesting; it's not a bad way to pass the time."
Inside the Infinity Castle, a woman dressed in a kimono like a noblewoman had also received the news. She had been following multiverse projection for a long time.
She was Kibutsuji Muzan, the original demon who plagued this world. She even claimed to be the 'Ultimate Life Form,' an existence akin to a natural disaster.
And as the 'Ultimate Life Form,' she was curious about all unknown things.
When multiverse projection first appeared, she had intended to use it to find the Blue Spider Lily.
However, after watching a large number of videos, she had never found any clues regarding the Blue Spider Lily. So now, her attitude toward multiverse projection was merely that of a tool to kill time.
However, this specially recommended video did pique her interest.
Not just her, but inside the Infinity Castle, an existence dressed as a samurai with six eyes also calmly opened the video.
Other prominent demons also received the news and opened the video one after another, wanting to see what was so spectacular about this video specially recommended by multiverse projection.
On the other side, the Hashira of the Demon Slayer Corps also opened the video, clearly quite curious about it.
It wasn't just this world; other worlds were the same. For example, in the Naruto World.
Having just resolved the Land of Waves incident and preparing to return to Konoha Village, Team 7 also came across this video.
In the Akame ga Kill World, Tatsumi, who had just joined the Night Raid squad, also spoke to his companions about it.
In the One-Punch Man World, Saitama, who was sitting with Genos watching the news, also watched the video with some curiosity.
Famous characters and protagonists from other worlds also received the news and began watching the video recommended by multiverse projection.
Within the Demon Slayer World, Tanjiro, Agatsuma Zenitsu, and Inosuke had already started playing the video.
The first thing that caught their eyes was a line of text.
NO. 10: Tanjiro's First Use of Sun Breathing to Save His Sister.
"Eh?"
Tanjiro was stunned, his expression becoming quite subtle. Was this talking about him?
Why would he appear in someone else's video?
"Eh?! EH!!! Tanjiro, you're on the list!!!!" Beside him, Agatsuma Zenitsu seemed exceptionally excited, as if the person on the list were him
"Sun Breathing?"
Beside him, Inosuke also caught the main point and looked a bit confused, because he remembered Tanjiro used Water Breathing.
Inosuke wasn't the only one confused.
Giyu Tomioka, who was currently on a mission, also showed a confused expression. Where did his junior disciple learn Sun Breathing from?
The other Hashira were also quite confused; after all, different names for Breathing Techniques meant different moves.
Tanjiro was the recognized disciple of Sakonji Urokodaki, and the Breathing Technique he used was Water Breathing. How did it become Sun Breathing?
Unlike the reaction of the Hashira, in the Infinity Castle on the other side, Kibutsuji Muzan, who looked like a noblewoman, immediately widened his eyes upon seeing this title.
"!!!!!!!!"
"Muzan-sama?"
Nakime, who had been staying silently by Muzan's side, sensed Kibutsuji Muzan's abnormality and asked softly, "Did something happen?"
Kibutsuji Muzan ignored her. Instead, he stared at the title, his pupils trembling as a figure appeared in his mind.
The man who almost killed him, the Ultimate Life Form, with a single strike.
The Breathing Technique he used was the so-called Sun Breathing!!!!
Impossible. Besides that man, is there someone else who has mastered this Breathing Technique again?!
Weren't all those who knew about Sun Breathing killed?! Why does someone still know about this?!!
Kibutsuji Muzan trembled. At this moment, he felt as if Tsukiguni Yoriichi had been reincarnated to find him.
"Sun Breathing."
In the Infinity Castle, Kokushibo slightly raised his head. His six eyes were filled with complex emotions. This familiar name reminded him of those scenes from back then.
He sat up straight and began to watch the following video seriously.
Just how did that fellow named Tanjiro master Sun Breathing once again?
No matter the final result, he would personally take action to kill the opponent, or turn them into a demon!