"Who the hell—" Tanjiro wrapped his arms around him and sobbed. "I'm sorry Giyuu-San... I can't stay here without help... I don't know what to do..." He froze.

"Tanjiro... what happened... before I ended up here..." the red-head looked up at him. "I'm sorry..."
"What happened..? I won't ask again." The red head cried harder. Tomioka looked at the puddle of blood gathered on the ground. His eyes went wide and he froze in shock. He stumbled backwards and caught himself in the wall. The door behind Tanjiro slid open and a masculine voice spoke. "Who's this? A Hashira? Oh, Sumiko! You're such a dear, would you be willing to share?" He asked. "He's not food, now get out of my room."

"What? Can y—"
"I said get out of my room!" Tanjiro turned to blast his head off when he sprinted away. He chased after him, grabbing Giyuu's arm. "Come on!" Tanjiro yelled at Giyuu. "Hurry up so we can kill this asshole!"

_________

Sumiko stared at the Giyu from his world. "You're so much nicer now... what changed?" He asked. "I met somebody wonderful." He smiled softly. "Who?"
"Shinobu Ko—"
"Don't say that name."
"What?"
"Don't. Say. That. Name."
"Why?"
"That bitch is a damn traitor, don't speak of her."
"Well you have to get along now. She's nice here."
"I liked it better when you were a horrible person."
"Heh, still can be, bitch."

______________this story will continue to be in Tanjiro's POV until further notice

"Do you have something you want to explain to me, Tanjiro?" Giyuu tapped his foot on the ground in impatience. "Or is that even your name anymore? 'Oh, Sumiko! You're such a dear'." He repeated Douma's words. "Tomioka— I don't know what happened! I-I didn't think I'd end up here when—"

"Tanjiro Kamado what the fuck did you do?!" Tanjiro stood there in shock and stunned silence. She hadn't heard him scream except when she first met him. He smelled of guilt and shame. Now he was angry, confused. "Remember that mission I had, the one after— after Nezuko died..? I was so fucking stupid, I— I..." Tanjiro couldn't keep talking before breaking down crying.

"I missed! I don't— I don't know how it happened... there was something bright and I ended up here— and I was— was this monster!" Tanjiro screamed between sobs. Tomioka didn't feel bad. None of this justified what Tanjiro just did, but he felt rather guilty instead. Nezuko dying, the two were on a mission with him. Giyuu failed— again.

"This counts as a suicide case." He finally said. "You and Sumiko were swapped because you died in the same moment, both a suicide. There has to be some connection."
"What— she killed—"
"Of course she did. If a demon slayer can get control of themselves after being transformed they have to commit seppuku. Either beheading or throwing their body into sunlight." Tanjiro nodded. "So I need you to kill me again. Tell her to do it to."

"I can't do that to you twice."
"You already did."

Tanjiro stood in front of a bloody corpse, well— not a corpse. He was breathing. Just knocked out and covered in blood. At least it was the right Tomioka for this universe. Now for... his part.

This will be harder said than done. He's already tried to behead himself. It didn't work. No matter how long he stood in the sun, he regenerated the burns, much to his shock. So he went with the next best thing—

—a fire created by his own blood demon art. There was a possibility it wouldn't work, so he kept Sumiko on standby. She had a pair of scissors, for her throat. They were Shinobu's surgical ones, sharp and long enough to kill her.

But, that isn't important right now. It was getting the Naphtha. If he was gonna die here, he would do everyone a favor. He'd take the uppermoons and demon king out with him. He'd already told Ubuyashiki of this plan, and he believed everything Tanjiro told him. About the separate worlds, all of it. It was almost too perfect.

Enough yapping though, he needed to get Tomioka out of there. "Nakime, will you do me this favor? Please..." Tanjiro asked her. She was his favorite by far. "Take him to my former home, with Nezuko. Bring yourself along with him. Don't come back here, tell Nezuko Sumiko will miss her, and try not to devour humans for me. This is a direct order from Sumiko Kamado." Nakime was dead silent. Tanjiro considered the fact she'd say no, but this was his only plan so it had to work.

"Yes, my lady. I'll try my best." Tanjiro saw a small smile framing her pale face. "Thank you." He closed his eyes for a moment and the two were gone. "This may take awhile without her help..." he sweat dropped.

He grabbed one container of the flammable liquid and poured it on the wooden tatami mats of the infinity palace (IDEK BRO IM TRYING—)

One after another, giving the place a grotesque smell. He held his breath as he made the long incision in his arm, letting his blood drip before activating his blood demon art, or, originally, Nezuko's. "Blood demon art...: exploding blood." He muttered, the red blaze immediately spreading throughout the infinity castle. He felt himself catching fire, burning up right away. This was the time, it felt amazing. The smell of wood and burning flesh was repugnant.

A ear piercing scream could be heard throughout the seemingly endless maze. Demons, ordered by Muzan to help her, ran into their demise, her dying before they even found her. The demon king himself lost his life, running into that fire to find his newfound mother figure. She was gone, taking the uppermoons and king of demons with her.

Nakime, however, summoned the burned body, both Sumiko and Tanjiro gone from it. Nezuko's cries were the only sound as she leaned over, praying it wasn't her sister.

Everything was normal in the og universe the end yes I rushed this.