As the explosion would happen Tanjiro would scream out for Jason as he couldn't do anything but watch as they ran away till they couldn't see the damage or the train as the dust rose up there would be a clash of 2 blades as sparks flew out from the strength of there clashes as they both then disappeared and reappeared everywhere once blocking and parrying each other's attacks both trying to get a hit in as Neo would yell out
"WHAT HAPPENED JASON I THOUGHT YOUR WHOLE KIT WAS TO BE FAST AND YET YOU'RE STRUGGLING TO BLITZ ME A MERE UPPER RANK 2!,AND YOU'RE DREAMING ABOUT KILLING THAT MAN!? DON'T MAKE ME LAUGH!"
Neo would laugh in excitement as his flames covered blades wouldn't be able to melt Jason's blade due to them being made out of Nichirin as they both clashed again as Jason spoke out
"So you really want to die that badly huh? very well then I'll give you a quick painful death you damn traitor!"
as Jason would exclaim before he felt a sharp pain as he would be knocked back with a slash to his right shoulder as Neo would chuckle and speak
"Such a shame you've grown weaker dear brother we're the bodies of Hantengu and Gyokkos not enough to get the rust out of your body?"
he would grin as all his eyes locked on Jason as Jason would just chuckle and hold still with his blade still in hand and Infront of him as he would then disappear from Neo's peripheral vision as he would be confused and looked around only to find that Jason ran away from the fight as Neo would grit his teeth in anger and let out a mighty roar as flame dragons flew everywhere hitting the train and making it explode even more as he would then feel a sharp pain on his neck as it was Jason now bandaged up and with the bandage wrapping tightly around his shoulder and making sure the blade doesn't get lost as Jason would be half way through his neck in one swing as Neo would then slash him down only for him to miss and hit wisteria bombs as they explode poisoning him as Neo would cough as Jason would try and push his blade further but stopped as he felt something grab him as he was in shock as Neo grew out 2 extra arms and pulled out his arm and threw him away before performing
"Breath of dragon Seventeenth form fire plume"
He would slash upwards creating a dragon made out of flames as Jason would avoid it barely getting his chin slightly grazed as Neo would laugh and take a breath as he stomped the ground and raised his 2 blades above his head as he would then make 2 blasters out of his flesh as he would then use
"Breath of dragon eighteenth form flaming bullets!"
he would shoot out 6 fire like bullets with pinpoint accuracy and extremely quickly as the bullets would only meet Jason's blade and his quick movement as he sliced away the bullets as Neo would then sigh and would stare at Jason as Jason disappeared from his sights as he would try and downward slash him only to be met with a flame storm as Neo used
"Breath of dragon Seventh form Chaos dragon wrath"
he shoots out countless shots of flames from his right gun as he then slashes everywhere creating dragons that explode into flames as Jason would get hit by one of the dragons and would fly backwards and slowly fall down on the ground as he would look around in shock as to where to land safely as the only thing he saw we're dead ends before chuckling as he would then use
"Lightning breathing first form lightning strike"
he would crash down quickly as he would slash downwards meeting with Neo's blade as they clashed blades as Jason would be heavily injured as he would then push Neo to the ground and disappear again as Neo would growl in anger as he would use
"Breath of dragon 10th form dragon scales!"
he would create a large fire dragon on his blade as he would make the dragon cover him up entirely as Jason would feel the heat from the other side of the train that had exploded as he would try to get his bearings and would then unseal a packet and look at it before smirking as he would disappear once again this time appearing Infront of the large dragon Neo had conjured up as he would throw 5 wisteria bombs at the dragon as they would get sliced apart and explode making the dragon disappear due to the explosion as Neo would just chuckle and perform a horizontal slash with a dragon following his slash
"Breath of dragon 17th form fire plume!"
his slash would only meet up with 5 more wisteria bombs as they exploded in his face weakening him even more as he coughed out blood and stumbled back as Jason would perform a counter attack as he charged at him as Neo saw this as he would slice down at him only to miss and hit 3 wisteria bombs that explode in his face as Jason would then use
"Breath of lightning fourth form lightning step!"
as he would charge at him as he fake slashed him once as Neo would try to go for a slice only to hit air as he got sliced from the back as Jason kept going back and forth switching sides from slicing Infront and back as Neo would then let out a roar as he felt his life deteriorating as he would then summon multiple blades out of his body as dragons flew everywhere as Jason would be shocked as he would slice down at one of the dragons as they exploded and sent him flying back into the train from the forest they were currently fighting in as Jason would cough out blood as Neo would take heavy breaths as he seemed mad and annoyed as he would go on to perform the final blow
"Breath of dragon 10th form dragon scales!"
he would surround himself in a flaming dragon before he would raise his sword up in the air and slice down sending the dragon he conjured up straight at Jason who would see it flying at him at lightning fast speed as he would brace himself as he had the wind knocked out of him by the force of the previous attack as the dragon got closer it would just disappear as Jason would be confused as the sun Slowly rose in the sky as Neo saw this and ran away deeper into the forest and was eventually summoned back into the infinity castle
[The return to the infinity castle]
As Muzan stared down at him as Neo was seething in anger hitting the floor in frustration as he let out a mighty roar as Muzan would silence him by making slicing his lower jaw apart as he would then notice Muzan and get on both knees and bow down to him as he Regenerated his jaw and would then speak
"Greetings lord Muzan i sincerely Apologize for my behavior I was just frustrated for I was extremely close to finishing of the Hashira and almost finished off the kids as well"
he said as he kept his head low as Muzan sighed in disappointment before speaking
"You're the upper rank 2 and yet you we're stalemated by one single Hashira Kokushibou would've gotten rid of the Hashira in a instant and the kid's no wonder you're still in upper rank 2 and lost too him you're getting weaker and weaker by the day Neo you're becoming like Akaza irrelevant to my plans"
as Neo would hear these words he would tremble in fear as he knows if Muzan doesn't find him of any use he can be killed this instant as Muzan pointed his finger towards Neo as he would then speak
"although I must commend you for that Hashira was your brother with potential greater than yours and still had more experience he only won by his experience and that too by a slither I won't kill you but I will punish you"
he said as he would make Neo's body crack into many pieces as he started trembling and coughing out blood as Muzans blood demon art black brambles would cover his body as he was basically being tortured as he wouldn't let lose and wouldn't say a word as he would be lifted up by the blood demon art as he Bled out more and more as he would take his revenge on Kokushibou and Jason as he would hang up there for 20 minutes before being let go as Muzan got bored of him not screaming as Neo would drop down and would stare up at him as Muzan would just look away and turn his back on him
"Heal up your wounds you look pathetic and if you want a rematch with Kokushibou we'll do it for your 19th birthday as a gift from your lord and savior"
Muzan would then disappear as Nakime stared at him and sighed and would speak
"Lord Neo are you ok? do you need some comfort? you're still younger than all of the Kizuki including Daki and Gyutaro the youngest of the Kizukis you're only 18 in demon years and 17 in human"
as Neo would look up at her as he was reminded of his mother comforting him every time Jason bullied him as he Regenerated and hugged her tightly before smiling
"This is nice thank you Nakime you're the best...."
he said as Nakime patted his head and comforted as if he was a child as he enjoyed it as he would steps coming closer as he would stop hugging and look around as it was Akaza the one who demon he didn't expect as Akaza looked at him in annoyance and said
"Hey newbie wanna go hang out and kill slayers later in the night?"
Neo would hear this and be surprised as he hid behind Nakime as Nakime was now scared as Neo would speak out
"What the fuck who are you and where's the Akaza I know he's not this kind that's something Douma would say !"
as Akaza would get annoyed and would try to punch him only for his arm to get sliced of by Neo as he stared at him with a cold look in his eyes and grabbed his arms
"Listen here Akaza I'm not like Douma i won't hold back if it means disciplining you into fearing my might and power I will not call you lord Akaza like Douma i have respect for myself and I will make you call me lord Neo even if it means challenging you a 1000 times in a battle to one shot you and make you understand that you can't stand to anyone on my caliber or higher you understand me don't you akaza?"
as Akaza would stare at him and just grit his teeth and would go for a headbutt only to be sent flying into the wall by a kick to the gut as Akaza would cough out blood from the impact of the kick as he would stare at him and was in shock on how a skinny figure like his could pack such a punch in one blow as Neo would pull out both his blades and cover them in flames
"Akaza....I will not repeat myself I am here to help lord muzan and not tolerate disrespect from you"
he said as he pointed his sword at him as his eyes glew a bright orange as his draconic pupils expanded as Akaza stared at him in anger still gritting his teeth in anger as he would pull himself away from the wall and charge at him going for a kick only for his leg to be sliced in half as he was sliced in half from the waist as his torso would fly in the air as Neo would do a round house kick too his ribs sending it flying back to the wall as Akaza would control his leg to attack him only for it to be sliced into bits and burnt away as Neo sent a small dragon Charging towards Akaza as it hit and exploded leaving akaza near deaths door as akaza couldn't Regenerate as Neo would breathe out letting out steam from his mouth as his face was covered in darkness only his eyes and the steam was visible
"Know your damn place you weak excuse of a upper rank i bet that even my older sister could beat you without much of a sweat and she's still not a hashira"
he said as he walked back to Nakime as Nakime would stare at him in fear and shock as Neo would sigh and smile
"Send me to Daki and Gyutaro's place Please"
Nakime would nod and would teleport him to the entertainment district as he would be teleported Infront of Daki
[The entertainment district]
As she looked at him in annoyance before noticing his eyes and who he is as she backed up
"U u u upper moon 2!?! w w where's lord douma?"
Daki said as she was terrified now as Neo stared at her as she was still standing as he chuckled and said
"On your knees this instant"
Daki would be shocked at what he was saying as she refused only for her legs to be sliced apart as she fell on the ground in pain as her Regeneration was slowed due to the flames as Daki would stare up at him in fear as her eyes teared up as she would call out
"ONIIIIII CHANNNNNN!!!"
as Gyutaro would slowly get out of her body as he looked annoyed and saw the build of a boy as he got even more annoyed as he didn't look up at him before he felt a menacing aura which made him drop his sickles and get on his knees and bow down too him as Neo stared at them
"Oi Gyutaro teach your sister some manners and to bow down to someone stronger than her"
as Gyutaro would nod as he starts thinking
"Shit who is this guy he doesn't have Muzan Sama's voice but he has the same aura as him"
as Gyutaro looked up at him as he saw Neo eye to eye as upper rank 2 was on his eyes as Gyutaro was shocked and started apologizing as Neo would just grab him and throw him outside the room and locked the room and looked at Daki and kneeled down to see her eye to eye as he slowly Regenerated her legs as she stared at him as he sighed and picked her up princess style as she was confused as Neo spoke out
"I like you why not become my personal assistant"
as Daki would be confused before Realizing as she screamed in surprise as her cheeks turned red as Neo just stared at her his eyes glowing orange
"So? have you decided yet Daki"
as Daki would just nod as she started thinking what was going on and why couldn't she stop herself from agreeing as she would then think
"What the fuck is going on why am i feeling this feeling it's sweet as if I wanna touch him I wanna kiss him I wanna be with him is this love at first sight!?!"
as Neo would sigh and hug her tightly and sit down and put her on his lap as he cuddled with her as Gyutaro would enter the room and just smile as his sister was now safe from everything except Muzan as Neo kept cuddling with her he fell asleep on her shoulder as Daki was surprised as Gyutaro would then think
"So he's still getting used to his demon body he still has some human traits left like not unlimited stamina but still he's so young and already a upper rank this guy must be strong as hell and has the potential of someone like lord Kokushibou"
as he sighed and would close the door and just sit there thinking about something as daki and Neo kept cuddling as Daki patted his head and played with his hair while he slept with his head buried on her chest as
[A bad dream]
He was now in a dream where he was a young boy again as he ran to his mother
"Mom! mom! I missed you!"
He was met by a push as he would fall on his back as he looked up at her as she looked terrified and disgusted at what she sees as she was looking down at him as she said
"My son would never do something like this you're not my son you're now only a monster"
As Neo would hear these words tears would form up in his eyes as he would wake up with a yell too his mother as Daki would stare at him in surprise as Neo would look embarrassed and cough
"Apologies for that I just had a nightmare"
he said as he got up and stared at Daki before sending Gyutaro out on a mission to try and find the blue spider lily while he and Daki had some fun as after 20 days he was seen leaving her room as Daki was surprised and passed out naked with love bites everywhere on her body and white stain on her stomach as we looked closer there was a bottle of mayonnaise and a deck of card on the table as they we're playing strip poker and whoever lost 10 rounds had to put mayonnaise on themselves as the scene shifted to the girls in the building as they we're blushing and had covered there mouths as the moans from Daki and him went on for 20 days and night as the scene shifted to Jason who was recovering from his wounds as he would go outside as he was then asked out by 3 junior slayers all 3 girls
[A harem? training first]
One of the girls had blonde hair with red eyes and the other had blue eyes and red hair and the last one had white hair with green eyes as he stared at them and blinked twice as they introduced themselves as the blonde one went first
"Apologizes we didn't even introduce ourselves I'm Lilith"
as the red hair went next
"Nice to meet you lord Jason I've been wanting to talk to you ever since you saved on that train my name is Lucy"
as the white hair went next and said
"An honor to meet you lord Jason I'm Yuki"
they said with a bright smile as Jason would stare at them in shock and disbelief as he face palmed and tried to make them understand something
"You're trying to find love in the demon slaying job? you are aware how stupid that sounds not even us hashira's know who we're gonna fight and if we're gonna live too see the next day"
as the juniors were still persistent as he sighed and agreed in annoyance as he would then go to his private area and Started training hard doing 2900 push ups with weights on his chest and with his girls on his back as he would do push ups alongside 2200 sit ups with 1 girl sitting on his laps as he did his sit ups as he started getting annoyed and a 100 meter run carrying all three of them while running with weighted clothing and a weight bound to his legs to lower his speed but to get faster when he runs normally as he would then do 1000 one finger push ups with the girls still on him and would do 3000 dumbbell curls with each arm on the daily as the scene would shift to Neo also doing the same training but this time he was bench pressing daki alongside gyutaro and akaza as he was embarrassed that he was being used as a bench press