They where all in the U.A dorms watching some hero movie when Izuku decided to just fricking ask her "Itsuka can I speak to you in private for a bit". She looked up from the movie at him "Oh uhh yah sure". The two went outside well away from the the dorms and about fifty percent of the girls who where whispering that Izuku was gonna confess a crush supposedly quietly. Alongside Mineta who was disturbingly excited.

They finally stopped and Izuku rounded on her "Now I've been meaning to ask you somethings about your trainer before U.A and about your quirk---s"."How wha- what d'yah mean quirks"."I mean how you have two of them but that comes second why did All Might"."He he didn"."Don't even try it I know what your personal trainer looked like Yagi was an overly thin half skeleton that constantly spat out blood now why does that sound familiar oh right thats All Might he looks like that when he's not using his quirk".

"Umm well my fr-friend was caught by a villain I rushed in without thinking and he saw me and f-for some reason he thought I could make a good hero s-so he asked me if I would go through his training for the U.A exam and I said yes". She was about to continue but Izuku spoke first "Ok that checks out now about your quirks don't even try to lie I already know quirks can be taken and given that potato headed suit guy was trying to steal mine"."Izuku I promised All Might I wouldn't tell anyone even you". Itsuka looked at the ground as Izuku began pacing back and forth.

Finally Izuku sighed andustarted speaking again "Its alright after all you're keeping a promise ... and you just unintentionally told me All Might somehow gave you his quirk". Itsuka was genuinely terrified had she not kept the secret well ejough would All Might be mad what would happen "How did you figure it"."Well I was like eighty twenty before you said that but if you want my full explanation All Might had those sparks that some times come off you when he was first making appearances, I am no hero fan these days but as a kid I was quite obsessed I pretty much burned his first appearance into my brain one of the only times those sparks appeared now this on its own isn't enough so I looked even further back at a name that All for One and All Might mentioned while fighting Shimura turns out there was a hero named Nana Shimura with a close connection to Gran Torino, All Might gave me that name when we first met because I figured out he was a hero but it turns out Gran Torino was his teacher but thats not what is so interesting whats so interesting is that Shimura also had green sparks in her first appearances so thats three people all three have been in some level of a teacher student relationship, unless there's something you want to tell me".

He whispered that part "And all have had green sparks and red lines appearing all over their body in their first couple years seems kind of suspicious, add in the fact that Nana Shimura died at the hands of a villain who first burnt down several buildings then shredded her body inside of a tornado so two completely unrelated quirks this kind of seems like All for One so why Nana Shimura he may have burnt down buildings but the only hero he killed was her despite there being several other heros there at the time, it almost seems like she had something he either wanted or wanted gone, but thats not right according to most every recorded sighting Nana Shimura had a fairly simple and week Quirk that allowed her to increase the speed something aged at by two the way she became so strong was early in her heroing career when all of the sudden she figured out she could burn off somethings time far faster and use that as fuel for incredible strength and speed kind of like your sudden explanation about how you can gain so much strength if you keep your hand small, this was all kind of just clutching at straws though but it was enough for me to ask you that question and get that response that confirmed it for me so thanks if it makes you feel better most of the time it was All Might being sloppy that tipped me off not you". He smiled at her "And all of this was elementary my dear Watson".

Itsuka stared at him in horror the bastard figured all that out and then made a Sherlock Holmes reference she's gonna kill him or maybe runaway in shame that some one figured it out so easily. Izuku was walking towards her fist clenched that small smile he held while fighting on his face he raised his arm and placed it on her shoulder? "Now can you please not lie to me again your terrible at it". She dumbly nodded at him thinking a very big fight was coming she wasn't sure if she was relieved or just very very confused at this point.

He looked down at his watch and clicked his tongue "Well we must be back to receive our punishment it is now nine eighteen and where supposed to stay in the dorms after nine". Izuku walked away from her until noticing that she wasn't following "Well come on then chop chop or Aizawa will chop our heads off". He grinned at her. 'Well' Itsuka thought to herself 'At least somethings haven't changed'.

Pretty big chapter quite hard to write and some parts felt a bit forced but all in all I think it was good explanation as to how Izuku figured things out. I hope you enjoyed and goodbye