This Bitch gives their stories Daddy Issues

Role Swap AU but in a different font

  Seniors and Juniors swap places.

Our favorite Demon Slayer Juniors are now the Pillars while our darling Pillars are now the Juniors vying for positions as tsuguko.

It is Tanjiro Harem because I have no self control.  One sided simping nonsense on everyone elses part.  Because he's dumb and too focused on avenging his family to notice the people throwing themselves at him.
Anywho.
Little taste of what I'm thinking of/how it would start.

     They're official Kanoe now.  They did it.
     Uzui is using all his willpower and restraint not to shout loudly as the young Master dismisses them.  They stand and move towards the shoji doors, Obanai is standing next to Rengoku as he opens them, the first thing to greet them is a taller man's chest, his Corps uniform has tiny bits of barely noticeable black embroidery on the black fabric.  His face covered by a cloth, 'Fire' it reads.
     His hair is gathered in a low ponytail, wrapped with what appears to be pink ribbon, he gazes down at them from behind his mask, wordless.
     After a long tense moment he nods slightly to them and looks up and over the the Master, "Ubuyashiki-sama.  A word?"

     The title is off putting, is he family to the young Master?  Something else?  And even more off putting is his voice.  Soft and kind.  Beautiful and loving beyond belief, for a moment the sound that rings from him makes Uzui's eyes water before he gets control of himself again.
     The young Master nods and they take the hint to file out of the room, the man slips in with grace, sliding the door closed behind him.

     "Good afternoon, Ubuyashiki-sama, I trust you are well?"
     "I am very well, Tanjiro.  Those were the new Kanoe, your thoughts?"
     "Well, I'd say they have massive amounts of potential.  That one boy was a Rengoku no?  And the other from the Uzui Clan?"
     "Yes, Tanjiro.  You are correct.  Now, if I may so kindly ask, what prompted this unexpected visit?"
     "An urgent matter, I have received concerning intel referring to the upcoming Final Selection.  I request permission to visit the mountain and investigate further."
     "What sort of intel, Tanjiro?"
     "Well-"
     "Uzui!  Are you listening in on the Master's private conversations?!"  Kyojuro accuses loudly.
     "What?!  No, shut up!"  He hisses trying to tune back in over the other's chattering.
     "You are, aren't you!"
     "Oh my God, Kyojuro.  Shut up!"  He groans and cups a hand to his ear.
     "Aaa...  You shouldn't do that Tengen-kun!"
     "Wha-  I did not ask for your input, Kanroji.  Seriously all of you be quiet!"
     "What are you doing??" Iguro scoffs at him, popping up out of literally nowhere.
     "Trying to listen to something probably really cool and important, so why don't you shut your traps!!"
     In the single moment of silence he gets he finally catches the conversation again, even in the bustle of the Master's estate.
     "-is something I have trust in.  You may go."
     "Thank you, Ubuyashiki-sama.  Please, be well."
     "You too, Tanjiro."

     "Huh?  That's it?  That's it???" Uzui wails and drags his hands over his face.
     "I can't believe you losers made me miss the whole important part!!"
     "Shut up, Tengen.  Just hurry up already, all of you.  I promised Kanae lunch."
     "Now that you mention it!  I'd like to see Senjuro-aniki again soon, we should celebrate my promotion!!"
     "Ooh, let me come over, I'll bring the girls too, your Aniki makes the best onigiri."  Uzui grins, letting the conversation go at the topic of Rengoku-style dinner.
     Obanai groans and rolls his eyes as Mitsuri giggles and claps, "Why don't we all go to the market to celebrate?!  I want to have another eating contest with you Kyojuro-kun!"
     "Alright!!!"
     By now they're made it out into the courtyard, the gravel crunching as they make their ways under the  sparse but well groomed trees towards the gates of Headquarters.
     "You're a quick lot."  The same warm, comforting voice from earlier sounds from right behind them.

     Mitsuri jumps like a startled cat as they all whip around, staring at the man from earlier in the Master's estate.
     "Y-you-!"
     "Don't be discouraged!  I'm very well trained in hiding my presence, but that's not what I caught up to you for."  The man waves one hand and Uzui sees callouses and scars and crooked fingers from where they were broken.  This is a practiced fighter.
     "I wanted to introduce myself properly.  That wasn't exactly how I intended for our first meeting to go, I do apologize for my rudeness, it was an urgent matter."  The man laughs light and airy, a soft and pretty sound.
     "That's quite alright!  An understandable thing!"  Rengoku answers, loud as ever.
     "You must be Rengoku Kyojuro.  A pleasure to finally meet you, I've heard a lot from your older brother."  The man holds out that same hand, Rengoku grasps it quickly for a handshake.
     "You know my older brother?!"
     "Of course.  He is a dear friend of mine."
     "And if it's not too rude, who are you exactly?"  Shinobu finally asks the million dollar question as the man releases Rengoku's hand and looks up to her behind his eerie mask.
     "Kamado Tanjiro, Sun Pillar.  It's a pleasure to meet you all."

     'They say he fought Kibutsuji all on his own.  They say he almost won.  They say he's the only one to see the Demon Kings face and live to tell the tale.'
     'I heard he's seven feet tall.'
     'Well I heard that he's half demon actually.  And thats why he has a demon sister.'
     'I heard his sword is a red so bright it made someone go blind once.'
     'He's scary, you know.'
     'Terrifying, I heard.'
     'Best hope you never meet him.'
     'It might be your end.'
     'He fought Kibutsuji, he's nothing short of ruthless.'

     Uzui think that maybe everything he's heard about the Sun Pillar was utter bullshit.