The month Izuku camps out in Nighyeye's office.

———

Mirai Sasaki, otherwise known as Nighteye, was not in the mood for this.
"Leave. Or I'll call the police." He threatened.
The teenager didn't even blink. "Not until you read my future."
"How you know I can do that greatly concerns me, but it does not change the fact that I will not." He stated, though, he didn't need his quirk to know where this conversation was going. Aizawa Izuku's eyes blazed with determination.

"If that won't change it what will? Money? Sworn secrecy? If I fight you and win?"
He scowled. "Leave."
"No. The future of Japan rests on my shoulders. At the very least, could you read my future and decide for yourself whether my concern is valid?"
"The future cannot be changed."
"Though you might have more experience," said the teenager firmly. "I respectfully disagree."

The greenette sighed, before crouching. He made a show of dusting the rug, before settling cross legged on it. "You know, when Aizawa said you were curious about me...I thought it was because you actually recognised me."
Sasaki had made a show of ignoring the teenager and working on the papers on his desk, but at this remark he looked up again. "I don't know what you mean."
Izuku giggled, a...familiar giggle. "Sasaki-san..." he said in a light voice, paired with a flirtatious pout. "How could you forget me!"
"H-Hisui!" He whispered, his face draining in colour. "But- how- when..."

His career was over. A few words from this brat and he was done for. He hadn't known he was underage...fuck! He'd built a life...and business...
"Don't look like that! Sasaki-san, you were one of the most respectful patrons I had." Continued Izuku in that same coy, childlike tone. "And paying for a lap dance, is hardly the same as having sex... you didn't even kiss me. You aren't married either...but then again," he tapped his index finger to his lips in exaggerated thoughtfulness, "it would make quite a splash..."
"You wouldn't." Realisation hit Sasaki, his guilt being shoved away by sudden relief, "your name would be tainted by it too. You're bluffing."
Izuku's teasing expression vanished, and his eyes darkened as he stood and strode to face the hero only the desk between them.
"Try me." He said, offering his hand.

On impulse, he took the proffered limb in his hand, and paled at what he saw when he met those determined, fierce green eyes.

———

Day 1

"I'll just ignore you."
Izuku just smiled as he produced the yellow sleeping bag, pulling a book from inside and opening it. He tried not to grin at the passive aggressive page turning going on a few feet away and got stuck into the novel.
He'd decided to learn Portuguese since it was spoken by a good quarter of the planet.
To help him learn, he was reading the Portuguese version of Harry Potter and the Philosopher's stone. He'd used a similar method for Chinese and French since he was familiar enough with the plot that he could work most of the words out, and how the language flowed.

He happily lost himself in that for several hours, eventually though he felt Nighteye's challenging gaze. Dinner time.
He'd called Oboro before his arrival, and he sent a silent prayer before burrowing into his dad's yellow sleeping bag.
A small, two foot portal was inside and when he popped through, he found a grinning Oboro with Tenko at his side. Oboro held out a steaming stir fry and winked, "give him hell."
"Best Godfather ever." Izuku told him with a broad smirk, taking the stir fry and getting out of the portal.
He watched it close as he shuffled out the bag and sat cross legged, helping himself to the meal and enjoying the gobsmacked look on the older man's face.

———

Still Day 1 - 11 pm

"I'm leaving."
"Done already? I thought with your eyebags you'd be here til at least 1 am."
The man actually growled at him. "Get the hell out of my office!"

The game of cat and mouse that followed was quite fun for Izuku, and Nighteye leaving with a door slam like a petulant teen was hysterical.
After waiting until the hero had left his radar, he crawled into his sleeping bag and through the portal entirely.
Himiko had joined the others while he was gone and as a more nocturnal person she'd volunteered to shapeshift into him and take the night shifts. She insisted she had lots to do but even Tenko and Oboro eyed her rucksack she was carrying with deep suspicion.
"I've become artistically minded." She said, with her best innocent eyes.
"Just...don't get me arrested for vandalism?"
She gave him a salute before hopping through the portal.

———

Day 3

Izuku tried not to laugh at how the methodical thunk of Nighteye's head on his desk matched the music in his headphones.
This man was not designed to deal with chaos or disorder of any kind.

The first night, Himiko had made pixel art using all the books in his office, and made paper chains out off all the documents in his waste paper bin.
Night two she'd been a bit more daring.
She'd covered the entire floor and his desk in Lego, perfectly fitted together so it took two hours to dismantle.
It was amazing.
Especially since the Lego spelt out 'Nighteye is gay', which had the bonus of thoroughly embarrassing and stressing the man.
Izuku bit into his lunch - roast chicken sandwiches - and turned the page in his physics textbook, ignoring the rhythmic thunks.

———

Day 4

"Remove your miscreant of a son from my office!" Roared Nighteye, hand shaking as he pointed at the teen.
Izuku swallowed his mouthful of chocolate cheesecake, and locked eyes with his father.
"Hey problem child."
Aizawa eyed him before producing a jumper and dropping it on his son's head, "offices like this are drafty. Don't catch a cold yeah?"

Izuku beamed as his pulled on the jumper.
"W-what?!?!" Izuku could have sworn Nighteye whimpered the question.
Aizawa rolled his eyes, "unless you want me joining him, don't go there."
And with that, the underground hero left, hands in pockets.

Nighteye slumped to his knees staring at the hero's retreating back with a vacant expression.

———

Day 7

"Yes indeed Inspector, please remove him from my office, and charge him if you can- no it wasn't forced entry but..."

Izuku listened as Nighteye approached, presumably with the police he'd threatened Izuku with seventeen times in varying states of distress.

He was a little nervous, not knowing which officers it would be, though he was pretty sure he knew the law and that as this was a hero's institute, he was allowed to 'seek asylum' here and remain as long as he liked. That law thankfully hadn't had a caveat about offices, but he was sure as hell once he left Nighteye would make sure one was added.

Finally, Nighteye opened the door to his office.
"Tsukauchi!" Izuku squealed happily, bounding up to the inspector. "It's been ages!"
The inspector looked shocked but returned the hug, and Izuku ignored the man's faint "oh crap" in favour of the warmth of physical contact.
"You know him?" Hissed Nighteye, looking hopeful for the first time since day 3.

Tsukauchi gulped, pulling away from Izuku to answer, "I...I do. Aizawa's son is well known to most of us."
"I knew he was a nightmare, now you can pin the brat on something, and please get him out of my office?"
Izuku smiled brightly and the hero visibly shuddered, "I think you'll find if you check the Refugee Recognition Act, subsection P, you'll find I'm allowed to seek refuge in hero commission buildings for indefinite periods, and avoiding AFO qualifies as needing refuge."

Tsukauchi pulled it up on his phone and showed it to Sasaki, looking very shocked when the veteran hero actually fainted.
One of his officers caught the man, as Tsukauchi turned to stare at him. "What did you do to the poor man Izuku?"
The greenette shrugged, "I've just been sat here reading mostly, only been here a week."
"Nothing I can charge you with I'm guessing."
"He'll argue harassment but you're welcome to see the tapes, to be honest, I'm the one who could more realistically press charges on that."
Izuku offered the man a coffee which he took gratefully.
Tsukauchi downed it, then paused.
"Izuku, where did you get an americano?"

———

Day 11

"...it would cause a huge paradox which could really mess with the space time continuum and cause untold disaster. Do you understand now, Izuku?"

Izuku looked up at Sasaki, the hero had assumed he'd been taking notes for the last hour of detailed explanation about why Nighteye couldn't tell him.
Without breaking eye contact, the greenette turned the paper around, on it, in perfect calligraphy were the letters 'IDC, STFU'
Sasaki desperately asked what the teen meant but he remained silent, making the man search up his own insult.

———

Day 17

"HOW!!!" Sasaki's voice had taken on a high pitch as he waved around the sleeping bag, having searched it desperately for where Izuku was keeping his food supplies.
Izuku finished one of his onigiri (cooked himself that morning before he swapped with Toga), watching on in amusement.
He'd honestly worried he'd find this stake out boring, but when he was a no show, AFO didn't even rampage, in fact the angry 'how dare you disrespect me and your father there will be consequences' letter had been pretty funny, as had the failed kidnapping of Bakugou resulting in the capture of 20 A-C class villains by the blond and Shoto.

Breaking Nighteye, well...
Izuku absently watched him weep into the yellow sleeping bag, prostrate on the ground.
He was very worried he was enjoying it too much.

———

Day 24

"How is your hair clean."
Izuku glanced over from the film he was watching on his computer, blinking innocently at the hero.
"I mean..." Nighteye's left hand had picked up a permanent tremor, psychosomatic. His hair was a mess and he seemed to have aged a decade. "You...you haven't left my office in three and a half weeks, and yet..."
Izuku smiled.
Sasaki burst into tears.

———

"12:03pm on Sunday." Muttered Nighteye in defeat, slumped on his desk.
Izuku beamed brightly, "Thank you sir, then my lips are sealed and I'll be on my way!"
"Good riddance." Growled Sasaki as the greenette left the room and with the action proved the future could change.