As Nezuko and Tanjiro climbed on top of the train, they soon caught a glimpse of Enmu as he stood at the front of the train, his back to them. Nezuko shouted over to him, "Hey, asshole, we're right here! Face us!"
"Hmm?" Enmu then turned around as both Tanjiro and Nezuko drew blades. "Good morning. So, my dreams did not work on you guys… How troublesome. If only you two had stayed asleep just a little bit longer."
"How dare you abuse the dreams of others," Tanjiro yelled at him in anger. "And how dare you manipulate others into doing your bidding!"
"How ungrateful," Enmu retorted. "How fucking ungrateful… After all I did, after I gave you guys such wonderful dreams. I didn't have to, you know. I could have created a dream where your family was slaughtered like fucking cattle. Would you have preferred that?"
Nezuko angrily yelled, "Shut your damn mouth, you piece of garbage!"
Enmu then noticed that Nezuko was a demon, and that Tanjiro bore hanafuda earrings, smiling in response. "I see… So, it's you two who are on my master's shit list… This truly is marvelous!" As he laughed, he exclaimed, "I have truly pleased my master, and by killing the two of you, I shall please him even more!"
"Breath of Water," both of the Kamado siblings then said together before they deviated in terms of technique used. Tanjiro said, "Tenth Form: Constant Flux!"
Meanwhile, Nezuko declared, "Second Form: Water Wheel!"
As the two of them charged at Enmu with different but coordinated attacks, he merely smiled and held his mouth-bearing hand out at the siblings, declaring, "Blood Demon Art: Whispers of Forced Unconscious Hypnosis!" The mouth on his hand then declared, "Now, go to sleep!"
Immediately, Nezuko and Tanjiro both closed their eyes and fell asleep, the two just barely avoiding falling off the train. However, within seconds, the two opened their eyes once more and regained their footing. Nezuko called out, "Nice try!"
"Well," Enmu replied to her as he dodged slashes from both of the Kamado siblings with his quick reflexes. "That was odd, but no matter!" He then held his mouth-bearing hand out again and declared, "Go to sleep!" Once again, Nezuko and Tanjiro fell asleep together before waking up within seconds. "Go to sleep!" Again, they woke up immediately after. "Damn it, go to sleep already!" As expected by this point, they woke up. Enmu thought to himself as they both readied another coordinated attack on him, "Why are they waking up so fast? Wait a minute… No, they couldn't possibly be-"
…
As it turns out, the following had happened every time Tanjiro and Nezuko involuntarily fell asleep by Enmu's hand.
The two woke up once again in the forest that they had grown up in, once again stuck in the winter. Tanjiro told his sister, "We have to die to wake up!"
"On it," Nezuko replied as she drew her pistol and shot herself in the mouth, killing herself instantly just as Tanjiro sliced through his own neck, coating the ground with his blood and dying right after she did.
Due to the time dilation within these deep dreams Enmu created, the two practically woke up at the same time in the real world. Each time Enmu tried to put them to sleep, they repeated the same process of committing suicide to wake up, nullifying the effects of the Blood Demon Art he possessed.
…
"They are," Enmu realized. "They're actually committing suicide every time they go to sleep so they can wake up! I gotta say, that truly takes some balls to do. Not just anyone can do something so horrible to themselves repeatedly, even if it is just a dream."
"You can't win," Tanjiro yelled at Enmu as he and Nezuko charged forward. "Now die!"
"Try this instead," Enmu replied as he aimed his mouth-bearing hand at them again. "Go to sleep separately!" Both Nezuko and Tanjiro fell asleep, this time in separate dreams. "This time," Enmu thought to himself as he watched them fall to the roof of the train. "They'll just give into despair!"
…
While Tanjiro had a nightmare regarding his family mistreating him and berating him for surviving Muzan's massacre, Nezuko was not faring much better. As she stood alone in the bloodied rooms of the Kamado house, her mother held the bloodied and badly disfigured body of Rokuta in her arms. "Mom…"
"How could you become a demon?!" Kie then spat at her own daughter, staining her face with her saliva. "The very thing that murdered your family?! You should have died with us!"
"No," Nezuko replied in fear, backing away from her mother and wiping the spit off of her face. "No, this isn't right, she wouldn't do this!"
"You are a shame upon our family, Kamado Nezuko!" Kie then threw Rokuta's bloodied body at her, staining her uniform with blood.
"No, sto-"
She stopped talking when the scene suddenly changed to that of the area immediately outside of her house. This time, she faced Tanjiro himself, who held his sword out and aimed at her neck. "You're an abomination, Nezuko. I should have let Giyu-san kill you when he had the chance."
Nezuko began to cry, hurt by what Enmu was putting in the mouths of her family. "Oniichan, please, stop!"
"Fuck you," Tanjiro coldly replied to her. "You're nothing but a cowardly girl who sold out her humanity to live longer. Do me a favor and shut your fucking mouth."
"That's not true! I stepped in to save my-"
Tanjiro slapped Nezuko across the face in response. "I said, shut your fucking mouth!"
"I need to get out of here," Nezuko replied as she ran away from Tanjiro and drew a gun. Realizing Tanjiro was chasing her, she turned around and shot him, striking him down before quickly turning the gun on herself. "You won't get away with this," she thought to herself. "Now I'm angry, Enmu. I'm really fucking angry."
…
When Tanjiro and Nezuko woke up from their nightmares, the former was about to yell at Enmu out of anger, but stopped himself when he noticed something was up with Nezuko. "Hey, uh, Nezuko…"
"Nobody," she began as her claws and teeth began to sharpen, anger and resentment building up inside her. "And I mean nobody has the right to shove words into my family's fucking mouth!" Nezuko charged forward, yelling at Enmu as she jumped into the air, "I'm gonna rip you to shreds!" It was clear that what Enmu had put her through in her nightmares had awakened untapped power within Nezuko that could only be accessed if she was enraged.
"So she thinks," Enmu thought to himself as Nezuko's sword contacted his neck and sliced cleanly through with brute force behind her swing. His head went flying into the air, and his body quickly went limp as it fell onto the roof of the train with a loud thud.
As Nezuko landed on the roof, she fell to her knees as she panted and hyperventilated, her claws and teeth retracting to their normal lengths and positions as she tried to calm herself down. "Okay… Okay… Okay…"
"That felt too easy," Tanjiro then told Nezuko. "Like… This guy's Lower Moon One, right? My fight with Rui was harder than this."
"You're right," she replied as she stood up and turned around to face him. "Something's up."
"Hey," Tanjiro then asked her. "Are you okay, Nezuko?"
"I'm fine," she assured him. "I just got a bit angry, is all."
"That really was too easy," Tanjiro remarked. "Way too fucking easy."
"You took the words right out of my mouth," Nezuko agreed. "What if… No, that's crazy, he couldn't possibly-" Then, as a mound of flesh rose from the roof of the train, with Enmu's head on top of it, Nezuko remarked, "Oh my God, he did…"
Enmu taunted the siblings, telling them as he rose over them, "You didn't think I was gonna make killing me that easy, now did you? My whole body is this train now! Unless you can find my real head, you have no chance at stopping me from eating all the passengers!"
"Holy," Nezuko remarked in shock. "Fucking shit…"
"We gotta tell the others," Tanjiro then yelled out as he climbed back down into the train. "Nezuko, follow me!"
…
Back in one of the train cabins, as Kyojuro and Thomas killed two more soldiers, they suddenly were surrounded by the fleshy ingrowths of Enmu's true body, shocking them. Thomas yelled out, "What in the blue God damn Hell is this?!" He then shot at the growths with his gun, but the bullets did not adequately hold it back.
"Look out," Kyojuro then warned him in English before he readied himself to attack. "Breath of Flames, First Form: Unknowing Fire!" He then dashed through the entirety of two cabins at blazing fast speed, slicing the ingrowths within seconds and shaking the entire train heavily. As Thomas watched in awe, Kyojuro easily destroyed Enmu's growths with his sword.
"Holy shit…"
Meanwhile in another cabin, Zenitsu screamed and fainted as soon as the growths appeared, causing Inosuke to yell at him, "Hey, wake up! Don't fall asleep on me again, Tenjitsu!" He then looked at the growths and sighed to himself, "Damn it, I'm on my own, I guess… Oh well, this won't be a challenge for me!" He then readied his swords and declared, "Breath of the Beast, Fifth Fang: Crazy Cutting!" He proceeded to slice just about everything in his general direction, causing the growths to back off of him and Zenitsu. "Yeah! Take that!" He then heard moaning behind him and turned around. "Huh? Himitsu?"
Zenitsu had managed to stand up despite still being asleep after he had fainted. "I will… I will…"
As Nezuko ran into the cabin, she yelled, "Guys! Guys! Enmu's body is the whole train! Everyone's in da-!" Suddenly, a growth managed to catch both of her arms at once, paralyzing her for the time being. "What the fuck?!" She screamed as she tried to fight back. "Get off of me!"
Just as suddenly as the growths appeared, a still asleep Zenitsu then pulled out his sword and quietly declared, "Breath of Thunder, First Form…" With a bright flash of light, Zenitsu disappeared and the sound of a sword slicing through flesh was heard before the growths fell off of Nezuko and landed on the floor. "Thunderclap and Flash, Six Fold!"
Inosuke and Nezuko stared at Zenitsu in utter shock, both of them at a loss for how he was able to attack while sleepwalking. The former quietly remarked under his breath, "Holy shit…"
"I will protect you, Nezuko…"
Nezuko blushed, replying, "Zenitsu-san…"
"I will… Agh…" Zenitsu then fell over, snoring as he did. "Raaagh… Nezuko-chan…"
Nezuko, annoyed he had done so, sighed. "And there it is…"
At the same time, James and Susamaru held back Enmu's growths in the front cabin right before the coal carrier and engine of the train. Susamaru declared as she drew her two swords, "Breath of Flames, Second Form: Rising Scorching Sun!" She then unleashed an arching attack, slashing upwards at a tentacle-like growth and killing it. "Honey, how are you doing?!"
"I got this," James replied as he then declared, "Breath of Flames, Fourth Form: Bloomin' Flame Undulation!" He then held back a growth that had tried to grab a hold of one of his legs before trying to go for one of his shoulders instead. "Take that, fucker!"
"What is this shit anyway?!"
"I think it's Enmu's body," James correctly inferred without knowing it. "If it is, we gotta find his head somewhere on this damn train!"
Suddenly, a soldier stabbed Susamaru in the back with a bayonet and tried to grab her. She yelled, "Agh, shit!"
James quickly pulled his revolver with his free hand and shot the soldier with his last bullet. The soldier yelled as he shot back with his rifle, hitting James in the shoulder, "That ain't enough!"
James screamed in pain, "Fuck!" As he did, Susamaru pushed the soldier off of her and stabbed him with one sword before decapitating him with the other, her stab wound now healing. However, as she turned around, she screamed, "Look out!"
A tentacle then grabbed James by the leg and suspended him upside-down. James was thankfully able to grab his sword and swing upwards, freeing himself. Tanjiro, having just walked in, yelled, "James-san, are you alright?!" He then slashed at another tentacle with his own sword before it could grab him.
As he got up from the ground, he was annoyed at himself for letting himself almost get caught. "Enough… Enough is enough! I've had it with these motherfuckin' demons on this motherfuckin' train!" He then looked at Tanjiro and said, "The train's his fuckin' body, ain't it?"
"Yeah," Tanjiro nodded. "We gotta find his head, and we gotta find a way to stop Enmu from attacking people with these growths."
"I got an idea," Susamaru then chimed in. "James, you said you can induce dreams, right?"
"Yeah?"
"What do they call it when they put an idea in someone's head like that? You mentioned it to me a while ago…"
"Inception?" James chuckled. "Y'all are insane if ya think we can perform an inception on someone as experienced in dream infiltration and creation as Enmu."
"Maybe you two can at least keep him distracted," Tanjiro inferred. "Come on, you guys could try."
"Fuck it," James shrugged. "Why not? Tanjiro, you'll have to come with us. We'll need a third guy for this."
"Got it," Tanjiro nodded as James cut himself on his arm again to make the blood pattern necessary for the Dream Creation Spell.
As he did, Kyojuro and Thomas ran in, with Kyojuro asking, "What's the situation up here?"
"The three of us are going to put Enmu in a dream," Tanjiro replied to him. "James-san is gonna try to perform an inception on Enmu and get him to stop attacking us. We need someone to guard our bodies."
"We can do it," Kyojuro replied with a nod. He then asked James and Susamaru, "Are you two sure about this?"
"Yes," both of them replied in unison.
"Very well," he replied with a smile. "I wish you all of my luck. Make me proud, you two."
