Disclaimer!! I do not own any of the characters featured in this story
All characters in this story are 18+
Story takes place while the students are in their last year of UA
 
 
Plot: Due to unfortunate events our main character Eijirou Kirishima has been affected by a shrinking quirk that has made him 5 inches tall. Thankfully he can still use his own quirk, as he tries to continue on with his life he finds that the different female heroes have hidden sides that come out around him.
 
 
It had been 1 week since Eijirou Kirishima (Aka Red Riot) had found himself affected by a shrinking quirk, while at first they waited for the effect to wear off they realized they had no way of telling, and while all of this was happening Kirishima was falling behind in school work, so it was decided that he would continue in his usual classes, Not that the boy had any problem, as he was wanting to get back to his school life.
Flash forward to the current day, as Kirishima walked through the halls, he had to stick close to the wall so as to not be stood on by an unaware student, despite his hardening being able to protect him he still didn't fancy being stood on. Normally one of his fellow students would help him out by giving him a lift to the classroom but it seems like he was out of luck today as he had overslept by accident. Just as he was nearing class 3-A he heard someone shout out to him.
 
 
“Oh, hey Krishima, almost didn't see ya there, what are you doing out here at this time?”
 
 
As Krisihima looked he say that the voice belonged to Kyoka Jiro, a fellow member of class 3-A, Kirishima got along with her quite well, as she was good friends with Denki, one of Kirishima's best friends,
 
 
“Oh, Morning Jiro, I accidentally overslept, I was just heading to class now actually.” the boy said.
 
 
“Is that so, why don't I give you a lift the rest of the way, though it's not that far…” The girl said with a smile.
 
 
Jiro ment down, offering the palm of her hand to Kirishima, and with a shrug Kirishima hopped on, and with that Jiro lifted the boy onto her shoulder, keeping him secure with one of her headphone jacks so he wouldn't fall off while she walked.
 
 
“So, Kirishima, How's life been with your new size and all? The girl asked
 
 
“I’m getting used to it, it's harder to get people's attention but with the schools help it hasn't been too bad, my quirk lets me stay safe from any trouble, though we still aren't sure how long this will last …” Kirishima said.
 
 
The girl stopped short of their classroom, looking as if she had something on her mind.
 
“Say Kirishima, I have an idea that I have been wondering about, you can decline if you want though, If you're not manly enough that is” Jiro said with a smirk.
 
 
“Hah, sure, I’m the hero who can take whatever's thrown at him,” Kirishima said, Smashing his fists together.
 
 
“Alright, I figure that it might be a bit dangerous out here so why don't i keep you inside my mouth for a bit, I promise I won't swallow, Unless you don't want me too” the girl said playfully
 
 
Kirishima was hit with the initial shock of this, why the hell would Jiro want him inside of her mouth? On one side she raised a good point, he wouldn't have to worry about being stepped on, but on the other side, was it really safe to be in the girls mouth.
 
 
“Surely she wouldn't mean to harm me…” The boy thought.
 
 
“You have gone a bit quiet Kirishima, and a bit red” the girl said.
 
 
“Uhh, ohh, Sure, if it keeps me safe, just try not to actually swallow me Jiro.” The Boy said after a moment.
 
 
Jiro smiled, her plan was working. Ever since she had seen the shrunken boy she couldn't get the thought of having him inside her mouth out of her mind. Barely containing her haste she raised the boy up to her mouth, and started to push him inside. At first he started to panic, at the suddenness of this all but he calmed down. She thought it was cute, as she pushed the last of Kirishima she noticed all the droll she had over her chin, using her sleeve to clean it up.
 
 
As for Kirishima he found his surroundings warm and wet, Jiros tongue tossed him around inside of her mouth, finding a comfortable spot to rest him. He was still uneasy as this was a whole new situation for him, he felt her breath wash over him, noticing that it had a hint of mint to it.
 
 
Jiro was amazed by the boy's taste. It was similar to a mix of cinnamon and blueberry, she was really starting to like her plan, and with that she walked into class, waving to her friends and taking her seat, soon after class started. Some of the students wondered if Kirishima was sick, as he hadn't turned up to class yet.
 
 
*Later*
 
 
Kirishima was unsure at how much time had passed, the girl seemed quite content with tossing him around, enjoying his flavor. He was still worried about the void at the back of her throat, unwilling to test how his hardening would fair against stomach acid, suddenly he hears someone start to talk to Jiro
 
 
“Morning Jiro, I noticed that you didn't say much during class so I thought I would ask if you wanted to grab some lunch together?” Momo Yaoyorozu said.
Momo was a tall girl and the female class representative of class 3-A, as well as good friends with Jiro, Self consciously Jiro went to answer, forgetting that she had Kirishima in her mouth”
 
 
“Surh I-” (Sure I) Jiro started, almost choking on the small boy
 
 
This confused Momo, as she was unsure as to what had happened to her friend,
 
 
As for Kirishima he was lucky that he was holding onto Jiros teeth, as if he wasn't he probably would have been pulled to the back, but now there was the problem of Momo finding out where Kirishima really was.
 
 
As for Jiro, now recovered from almost choking on Kirishima she thought about how to go about it, She didn't want to make Momo think that she was weird for having Kirishima inside of her mouth for the whole class, so she thought about swallowing the boy, but stopped, as it would be unfair on him, as it seemed like he really didn't want to be swallowed. But she made up her mind.
 
 
Kirishima’s world was lit up as the girl opened her mouth, pulling him out onto the palm of her hand.
 
 
“What in the world, Jiro, why the hell did you have Kirishima in your mouth.”
 
 
Before Jiro could answer, the small Kirishima came to the rescue.
 
 
“No Momo, it was my idea, I made Jiro do it.” the boy said.
 
 
“Hmm, Is that so, somehow I doubt it, as I happened to know about Jiro’s tiny related fantasies already,”
 
 
Jiro was shocked “W-What, How did you know?!? That was a secret!”
 
 
“Just an educated guess, from the way you have been looking at Kirishima I figured something like this would happen, though to be honest I'm surprised it didn't happen sooner.”
 
 
Both Kirishima and Jiro looked towards the ground in embarrassment. Momo let out a sigh.
 
 
“Don’t be too glum about it, though I will have to punish you two for doing such things in class, Jiro, You are to come to the classroom after school, as for you Kirishima tomorrow and lunch you are to meet me here.”
 
 
With that the sulking pair went back to their normal school day.
To Be Continued: