In this world demons did exist under Muzan, but they all died off 120 years ago 30 years after the demon king was killed or so most of the world thought. The demon king had actually hidden a very small portion of himself inside of one of his human subordinates however being inside that human for so long changed his ways and softened his heart. He soon began to love but that's a story for another time.
Also, quick note you graduate from the academy at 17 in this, this was decided after everything happened with itachi they didn't want that to happen again.
We however start off in Konoha academy with a red headed teenage boy with spiky hair and blue eyes trying his best not to fall asleep while his teacher was talking. Cut to outside the academy.
A feminine figure cloaked in darkness sat on a tree watching the boy through a window. The figure spoke to herself"look at little menma isn't he cute, shouldn't we go say hi? There shouldn't be any problems with it anymore since he's a ninja now, and I'm tired of seeing him be picked on". She sat quiet for a few more seconds as if she was listening to someone speak until she spoke again " aww ok I'll wait but it doesn't seem like it'll be much longer". Back to inside the classroom.
"Menma, Menma , MENMA!." screamed the brunette teacher from the front of the room. The red headed boy now identified as Menma shot out of his seat startled at the sound. The entire class erupted into laughter at this when all of a sudden a feral brown haired boy shouted "What's wrong scaredy cat? Did you see another strange shadow or did Iruka really scare you that bad?". Menma hearing this sat back down in shame. As this was happening the feminine figure had jumped up from sitting on the branch and was crouched down standing on the branch as if she was gonna pounce until all of a sudden an large arm protruded from her back grabbing onto the branch keeping her from leaping off. The figure seemed to wince in pain and go back to sitting on the branch properly. "Why are you stopping me, look at what they are doing to him, I can even tell your also furious even more so than me so let me go in there and handle it.". Another arm sprouts from her right waist as the arm from her back moves its position of connection to being on her left waist both arms wrapped around her and held onto the tree. The figure slowly sat down while nodding her head at something as if someone was talking to her. The figure spoke again "Alright I'm sorry, brother. I'll calm down but I'm putting that one on ice soon".
Back to inside the classroom. "Alright now that Menma is awake, we can begin team placements" Menma zoned out everything until he heard "Team 7 Menma Uzumaki, Sakura Haruno and Sasuke Uchiha" A pink haired girl's head shot up and she cheered as all the other girls in class except for two, one purple haired girl and a girl wearing Shades and a giant coat that hides her figure so well her voice is the only way you can tell she's female. "Your Jonin sensei will be …." Iruka stops as his eyes widen in fear and he begins shaking "S-Special Jonin Naruko Kibutsuji" The class is shocked and puzzled as they've never heard this name and are confused as to why Iruka is shaking in fear at the mention of it. Iruka then composes himself as he resumes "Team 8 Hinata Hyūga, Shizue Aburame, and Kiba Inuzuka, your Jonin sensei will be …" Iruka stares at the clipboard in fear before running behind his desk as he continues while quivering and hiding "J-Jonin N-Naruto Kibutsuji". This reaction sent the class even more into a state of fear panic and confusion as their sensei is being reduced to the fetal position just by the mention of this Naruto Kibutsuji they've never heard about. Iruka is still quivering behind his desk as he continues. "Team 9 is still in circulation and team 10 is Ino Yamanaka, Shikamaru Nara and Choji Akimichi and your Jonin sensei will Jonin Asuma Sarutobi". Iruka looks left and right checking the surroundings before continuing "Now class wait here for your Jonin sensei they will be here any moment"
Slowly all the teams were picked up except 7,8 and 10. A Man with a chin strap beard and an unlit cigarette in his mouth entered the class, said his name is Asuma Sarutobi and called for team 10 and soon enough teams 7 and 8 were the only ones left. As a few minutes passed the teams 7 and 8 were thinking over iruka's reaction to hearing about their senseis. Most of the soon to be genin just brushed it aside as their sensei's and Iruka having a bad history, but the girl in the giant coat and the pink haired girl were wondering if they had gotten some monstrous mass murderers as senseis. Just as everyone was about to voice what they were thinking, in came another person this one seeming to have not an ounce of shame if their clothing choice says anything about it. This was a 6'8 grey skinned voluptuous woman with jet black hair with vibrant red ends wearing what looked to be a sort of modified sports bra bikini top hybrid, an Obi(sash) around her waist and a pair of bikini bottoms. She also wore Black and red stockings with normal ninja sandals. All the boys in class gawked at the sight before them when all of a sudden the pink haired girl shot up and screamed "Why are you so late? and put some clothes on that's completely indecent!". The 6'8" grey skinned woman whipped an arm out as her sash was in an instant around the pink haired girl's neck "You see I already don't like you so don't you ever raise your voice at me if you want to stay alive and as for my clothing it was a simple oversight I forgot where I was going is all, I'll be back kids"
The woman says as she snaps her fingers and seems to vanish into thin air but her sash remains around the pink haired girl's throat. The pink haired girl struggling to breath, claws away at the sash around her neck trying to get it off as slowly everyone gets up to try and help her. A minute passes as she loses consciousness, and the sash seems to just vanish afterwards. Menma went to check her pulse and sighs in releif as he shouts, "It's alright everyone she's still alive" This resulted in a few relieved sighs but then those sighs erupted into full blown panic as the 5 still conscious students in the class were now worried as to who's sensei that is and if she was going to do the same to them if they messed up.
After another 15 minutes or so the woman came back in now wearing a odd black and red schoolgirl crop top with a sort of short black skirt along with her stockings, obi and ninja sandals. "Alright now that that's done, wake up the pink one" She says as tosses smelling salts towards the girl in the large coat "Now you all must be teams 7 and 8, crowd around Menma I'll take you to training ground 7 where we'll do our introduction and small test."
The woman then seemed to disappear from her spot and reappear behind Menma hugging him from behind. Due to their height difference (she's 6'8" and Menma is 5'9") her hugging Menma from behind, his head was planted right between her boobs. The girl in the coat walks over to the pink haired girl who was placed back onto the bench of her chair by Menma and places the smelling salts under her nose, this causes the pink haired girl to shoot up awake. As soon as the pink haired girl sees that the woman is there, she goes to scream again but stops not wanted to be choked out again. She turns to the girl who woke her up and softly says " Shizue thanks for waking me up but what's going on? And why is she holding Menma like that". She is more chill than her cannon version because they all were in the academy longer, so they actually got real combat training so she's not as much of a scared banshee like in the original series and instead she actually has some backbone and isn't going to shaken that easily. The girl in the coat now identified as Shizue whispers back "Anytime Sakura, and she just called for both the teams to crowd around Menma so she can take us to training ground 7 for an introduction and test". All the while as this was going on Menma was incredibly flustered trying to figure out what was happening. The now named Sakura suddenly and gently asked in a slightly fearful tone (I said she has backbone but that doesn't mean she's not going to be at least slightly afraid of someone who just choked her out with no hesitation) "Um can you tell me why you called for both teams your just one person so can't you be the sensei for both teams right? Sorry if that came off the wrong way, also what is your relationship with Menma seeing as your holding him like that". The woman snapped her head towards Sakura as she asked this making Sakura flinch in fear thinking the woman might attach her again but instead the woman simply opened her mouth to speak "Well Team 7 is my team, but Team 8 is also coming with because their sensei will be there too.". Sakura sighed in relief, releasing a breath she didn't realize she was holding, and spoke again "um sorry to ask this again but you never told me what your relationship with Menma is.".
Everyone turned toward the woman as Sakura said that, and the woman simply smiled before speaking "You all will learn that shortly but come on, we don't have all day.". The soon to be gennin all crowd around the woman and her sash wraps around them all as she snaps, and they appear in a building that looks almost like a castle of sorts. Before the future genin can even look around much of say anything, the woman snaps her fingers again as the group is transported into a open field as she began speaking "well everyone we're going to be doing our little introduction in a bit but first I want everyone to split off into your 2 teams an elect a leader amongst them."
The Soon to be gennin split off with Menma, A black haired boy and Sakura going to sit next to a tree meanwhile a purple haired girl, The brown-haired boy with the dog on his head and Shizue all sat on the other side of the clearing next to what looked like a giant rock. Cut to Team 7
Team 7 all sat in silence in a triangle formation next to a tree. Menma sat cross legged seemingly annoyed, the black-haired boy sat with what looked to be a bingo book (the bounty books) in his hand, and Sakura sat on her legs staring at Sasuke. Menma suddenly broke the silence by saying "I think I'd make a great leader don't you agree Sasuke?". The now named Sasuke looked up from his bingo book before speaking, "Yeah, whatever as long as you don't get in my way.". Just as Sakura Opened her mouth to speak. The woman simply appeared in front of them clinging onto Menma as she had done previously but This time, she had placed him in her lap and hugged him tight as if he might jump out of her grasp, his head landing directly in her chest. "Now now Mr. Brooding Uchiha, Thats not the kind of attitude you should have in front of cute little Menma here." the woman said a motherly tone as if scolding Sasuke. The trio were shocked at how fast their sensei was, even though she had shown similar speed in the classroom it was still simply unreal to the newly graduated students. Sasuke was the first to snap out of this stupor and asked, "What do you mean, I just simply don't see any issue with him being the leader?". "Ugh ... That's exactly the point" The woman says, "You're way too unenthusiastic, actually think on it. Don't just choose based off convenience, even though Menma would win anyway" The woman muttered that last part.
Menma and Sakura who snapped out of their stupor when Sasuke asked his question and seconds later both realized something as they both spoke "Why are you hugging Me/Menma like this/That". Menma wasn't exactly complaining but he just met the woman, so he was genuinely confused meanwhile Sakura was slightly jealous. Just to be clear she still has her crush on Sasuke, but she has minor feelings towards Menma as well because he was one of the more handsome boys in class. Btw Menma looks like Soma Yukihira from food wars. The image is in the charecter images tab. "Oh does Little Menma like this?" The woman says as she squeezes him even harder. Menma, finding it hard to string together a sentence as he is feeling everything , says "C-c-can you t-tell me why you are d-doing this". At the same time this is being said Team 8 shouts "We figured out a leader". Naruko sighed and let go of Menma as she spoke "One second I'll be back for you later Menma". Naruko then vanished and appeared over near Team 8.