As Reiko ran down a walkway inside the ship, looking for any signs of Hiro and Ichiro, she suddenly came to a stop when she heard shouting behind her. "Who's there?!" However, as soon as she came to a stop, she found herself face-to-face with Hiro, who had appeared before her out of thin air and struck her in the chest with a knife. The sudden attack threw her back several feet, and as the wound in chest healed, she suddenly felt weak and tired. "What the fuck did you do to me?" As she began to slur her words, she fell to her knees, her arms and legs feeling many times heavier than they were. "Fuck… Fucking Hell, what's happening?"

"This won't kill you," Hiro replied. "This will just make you very tired for a while. Once you pass out, you're coming with me."

"Don't… Don't try anything, asshole," Reiko spat at him as she began to slip in and out of consciousness. "My brother is… My brother is coming…"

"I'd like to see him try to beat me," he replied before he violently kicked Reiko in the face, knocking several of her teeth out and breaking her nose. As the wounds healed, she finally passed out and stopped responding to him. Hiro smiled as he picked her body up and told her sleeping body, "I'm gonna have so much fun with you! So much fun! My brother will be sure to join me, too! It's too bad you won't be awake for most of it!"

Ichiro then ran over, asking Hiro, "Nii-san! Nii-san! What did you get for us today?"

"A demon girl," he sinisterly replied with a sickening smile. "And I think it's one of the two runaways from Rui-sama's family. She sure looks pretty, doesn't she?"

"I agree," Ichiro replied as he cupped her face in his hands and began to slowly move down her body. "She is incredibly attractive. I've always wanted to have some fun with one of the girls in Rui-sama's family, but he would have never allowed it. Now we can do so in peace."

"I like your way of thinking, little brother," Hiro replied. "Let's take her to our little corner for a bit."

Meanwhile, as Muichiro slept next to Mukago in bed that night, he found himself stirring in his sleep several times as he began to experience a dream. After a few minutes, he awoke in his dream to find himself in front of a modest rural house in the middle of winter. As the snow below his shoes flattened, he looked around and saw that there were no other houses around them. "Where am I? What is this place?" The air around him was cold and unwelcoming.

Then, a man with long dark and burgundy hair and markings on his face emerged from the house. He spoke Japanese in a manner that was rather old and more consistent with the early Sengoku Period, which puzzled Muichiro greatly. "Greetings, visitor! Come on in!" On his person was a sheath for a sword, with said sword firmly inside. "I see you possess a Demon Slayer uniform from the modern era. Tell me, what is your name, young man?"

"Tokito Muichiro," he replied as he walked to him. "The 4th Mist Pillar of the Demon Slayer Corps."

"4th Mist Pillar, huh… Tell me, which breath is that derived from?"

"The Breath of Mist is derived from the Breath of Wind," Muichiro replied, unsure as to why the man had asked him.

"I see," the man replied. "I see they've made more than a few nre breaths since the 15th century. My name is Tsugikuni Itoho."

"15th Century? Tsugikuni? Then you must know of Tsugikuni Yoriichi." Muichiro had heard of the aforementioned former slayer. "The one who almost killed Kibutsuji Muzan.

"Tsugikuni Yoriichi… Tsugikuni Yoriichi…" IItoho then pondered to himself as to whether or not to answer the question. "Now that's a name I have not heard in a very long time, young man."

Muichiro, curious, asked, "Was he dead by this point in time?"

"No, not yet, at least," the man who claimed to be Itoho replied.

"Do you know him?"

"Of course," he replied as he pointed to himself. "He's me. I haven't gone by the name of Tsugikuni Yoriichi ever since I was about 24. If I had to guess, I'm about 30 or so in this afterlife of sorts."

"Afterlife?!" Muichiro was immediately scared of the implications. "Does that mean I'm dead?!"

"Of course not," Yoriichi replied with a laugh. "You're just visiting me is all. Come on in." The two of them then entered Yoriichi's humble abode, which contained a fire pit in the middle with a fire roaring inside. "You know, now that you're in here, I suppose I owe you an explanation as to why you're dreaming like this."

Muichiro nodded as he sat down. "I suppose so, Yoriichi-sama."

"No need to be so formal," Yoriichi replied. "Call me however you want. Anyway, the reason you're here is because you are in fact a descendant of me through my brother, Tsugikuni Michikatsu, and his wife, whose maiden name was Tokito. After he left the family, his son and daughter took their mother's last name."

"Why did he leave?"

"My brother was not perfect," Yoriichi admitted. "He made mistakes, and over time, he came to regret leaving his family. He did so to become a Demon Slayer like I was, since before then, he was a samurai. Even so, he was still an incredible fighter, and one of the best swordsmen I ever had the honor of knowing. I know I sound biased since this is my family we are talking about, but it is true." He then stood up and walked over to a box nearby. "Speaking of, I want you to have this. It will materialize in the real world when you wake up." He then opened the long and narrow box and pulled a sword out with a black and yellow grip and a black hilt. "This was my brother's sword. He used this from the time he started as a samurai up until he died. You can use it as your primary or secondary sword if you want."

As Muichiro was handed the sword, he admired its looks and quality. "This sword is still well-kept, even after all this time. Say, what happened to your brother?"

Yoriichi sighed as he began to recount what had happened several centuries prior to Muichiro, the memories of which still clearly haunted him. "Well… The two of us had a young student of our's who learned Michikatsu-niisan's breathing style, the Breath of the Moon. I had the Breath of the Sun, by the way. Anyway, this student lusted for power and was jealous of his peers for even slightly exceeding him in any aspect, no matter how small or large." As he got to the next part, he took another deep breath. "His name was Kokushibo, and his lust for power eventually led him to Muzan. Muzan agreed to turn him into a demon as long as he made sure to take out several slayers along the way. Once he was one, he helped Muzan hunt down the Demon Slayer Corps, and over the course of a few months, he almost wiped all of us out. Kokushibo betrayed and murdered my brother, and now he is Upper Moon 1 thanks to his rampage. The Breath of the Moon is also all but extinct except for him as well, since he wanted no one else to use it so nobody could surpass him."

Muichiro was horrified to hear of what had happened to Michikatsu. "Why?"

"Kokushibo was not born a terrible person," Yoriichi replied to him. "He was seduced by evil, and manipulated by Muzan. While there exist demons who were terrible people as humans, a majority were not born that way. Many of them simply felt as if they had no chance but to accept the so-called help that Muzan offered. Some were even turned into demons involuntarily, or were tricked into becoming demons, such as a lady I once met whom Muzan once had as a concubine. Her name was Tamayo, and Muzan pretended to be a doctor and offered her a miracle cure for a sickness that would have killed her."

"I'm not sure why," Muichiro noted. "But that name sounds familiar."

"Perhaps she is still alive today," Yoriichi replied. "She accepted this so-called miracle cure because otherwise, she would have left her children without a mother and her husband without a wife. Instead of giving her a cure, Muzan turned her into a demon, and then intentionally had her eat her own family while she was in a mindless state. By the time she came to, it was too late. The reason she is still alive today is because I spared her and freed her from Muzan's control. My failure to kill Muzan and my sparing of Tamayo are why I was almost kicked out of the corps. Hearing her story is what made me realize that not all demons are terrible, and made me hope that one day, they could be free from Muzan."

Muichiro could not help but think of James when he mentioned the idea of good demons. "Well, we have a few now! There are demons beyond Japan who are on our side! People are starting to change their minds, and it's giving us a great advantage."

"I had a feeling that was the case," Yoriichi gleefully replied. "After all, it's not often you see a slayer having sex with a demon, much less fathering a child with one."

Muichiro blushed in response. "Please don't tell me you saw or heard us." He had had sex with Mukago before the two fell asleep.

"Unfortunately I had to," Yoriichi chuckled. "You think it's bad being listened to? Imagine being the one who has to involuntarily listen to it. It's awkward. It's really awkward." Changing subjects so he would not have to keep cringing at the thought of his descendant and his descendant's girlfriend having such relations, he told him, "Now, you are free to come back to this place in your dreams at any time. I'll try to come around as a ghost, too. When we meet up, I will train you, as I suspect that Kokushibo has a strong interest in you, and I want you to be prepared when the time comes to battle him."

"Thank you," Muichiro replied as he stood up and bowed. "I will see you again soon, Yoriichi-sama."

"Again, no need to be so formal," he replied. "Just call me Yoriichi-san or something."

"Of course, Yoriichi-san."

In an instant, Muichiro suddenly woke up to Mukago shaking him awake. "Mui! Mui! Hey! Mui! Wake the fuck up!"

"Huh? What?!" Muichiro then sat up in bed, shirtless due to the weather, and looked around. "What's going on?"

"There's an emergency," Mukago told him before she turned to the front of the bed. "And, uh… What's with that sword that just randomly appeared in front of our bed?"

"It was real then," Muichiro told himself as he jumped out of bed and grabbed it, astonished at how the sword materialized out of thin air and was exactly like the sword in his dream. "Mukago, what's going on?"

"There are four demons on this ship aside from me," Mukago explained to him. "Two are good, but the other two are Lower Moons and have been hunting crew members and passengers down. Come on! We have to go meet up with Anula-san and Nagamine-san! One of the two good demons got kidnapped, and they're fearing the worst."

"Let me get dressed first," Muichiro replied as he put the sword down and hurriedly grabbed his corps uniform from the closet of their suite. "You should get your uniform on as well." He then pulled out her uniform as well. The two had no idea what to expect, but were prepared for a fight, and it was a fight they surely would receive.