Izuku's a weirdo in this chapter. This is when his inner child groomer comes out.
And his tattoos are on Ao3 chapter 13
Katsuki stood frozen in place, staring at the man who felt just like his best friend.
He watched as Izuku kneed down in front of him from his spot on the couch. He held out a large, gloved hand and pat the boy's head.
"Hello Katsuki-kun. My name is Izuku Midoriya. It's a great pleasure to meet you."
Yup, no doubt about it. That was definitely Deku. He had the same soothing and echoey tone in his voice, the same smoothness, the same accent, the same old way of talking, the same everything. Even that feeling that he's not what he appears.
"Hi.", Katsuki murmured back, still in shock.
Mitsuki bent to pick up the boy and Deku rose. "Well that's new.", the woman noted with furrowed brows.
Deku tilted his head. "What is?"
"He usually tries to annoying the stuffing out of his sitters so they leave him alone.. Guess he likes you.", said Masaru, chuckling.
Izuku also laughed. "Maybe. Though I must ask, why not just hire a maid to watch over him- considering how wealthy you two must be."
"What gave you that idea?", Mitsuki asked.
"Well for one, your house. For two," Izuku gestured to Katsuki. "Katsuki-kun's entire outfit is from Armani, and very expensive on it's own, which I'm sure you know."
The air became heavier, the Bakugou couple tensing. Katsuki squirmed in his mother's arms until she let him slide to the ground.
Masaru slowly shook his head. "That... that's part of the reason why we asked you to watch at school and when school was over." He cleared his throat, crossing and uncrossing the folds of his cardigan. "There's someone watching him, and we heard he's bad news. He may be trying to hurt Katsuki in... those ways.."
Izuku nodded. "Strange, but I can handle it. He won't get past me, don't worry." He picked up Katsuki in his arms. "I'll keep him safe. You have my word."
"I always have, and I always will. The end won't happen again. I won't fail this time, I swear."
Class was certainly interesting that day.
The children and Katsuki's teacher were wondering:
1. Who was the tall man with the bright eyes?
2. Why did he come with Katsuki Bakugou of all people?
3. Where was Deku?
Thankfully, no one bothered Izuku, except the teacher, who Izuku reintroduced himself to.
After getting back to Katsuki's house in Izuku's fancy car, Katsuki was bouncing off the walls.
Izuku managed to settle the blond child down with a couple GoGosqueez applesauce pouches (because those are amazing).
Izuku made lunch and dinner with Gordon Ramsay as his assistant because he's picky.
The day sped by and soon enough, it was bath-time for Katsuki.
Izuku help the blond strip and get into the too-large bath, rolling up his sleeves and kneeling by the tub. Katsuki splashed around in the pinkish, lavender scented bubbles with Deku watching with adoration.
The boy turned to the man beside him.
"Get in.", he demanded.
Izuku blinked a couple times, confusion clear on his face."Hm?"
Katsuki shifted in the water. "Get in with me Deku."
"I can't Kacchan."
"Why not?", the boy whined.
"I'm an adult, and you're a child. That's wrong."
"I's wrong to watch a kid in their room at night, but you did that anyway."
Izuku sighed. "That may be true, but I could get in a lot of trouble if anyone found out."
"How would they find out?" Katsuki's hands gripped the porcelain of the bath, wide eyes looking up at the man.
"The police could be watching us-me-especially after how your interrogation went."
"They're not watching us Deku. That would be wrong."
Deku paused. "True again. But one of us might accidentally tell someone-well I wouldn't tell anyone, of course not, but you-"
"I WOULDN'T TELL ANYONE!"
Katsuki felt his heart pounding in his chest as he watched Izuku flinch at his volume. The man sat silent, simply staring at Katsuki in an unnerving way, his eyes unblinking.
"You wouldn't tell anyone?"
The boy rapidly shook his head, blond spikes flying. Izuku stood and shrugged off his jacket, unbuttoning his cuffs.
"You promise you won't tell if I get in with you?"
"I promise!", the blond exclaimed. He lifted a hand, extending the pinkie. "I pinkie promise!"
Deku curled his own little finger around Katsuki's and looked him dead in the eye.
"You promise you won't tell anyone about anything that happens. No matter what we do, without my permission first."
"Mhm, I promise." Katsuki replied.
Izuku took back his hand and started to unbutton his shirt. "Close your eyes, turn around, no peeking."
Katsuki turned around with his hands over his eyes. He listened to the sound of rustling fabric, starting to get impatient with his excitement.
Deku was pretty weird, he thought. Making him pinkie promise not to tell anyone. Who would he tell? His 'friends'? Oh right, Deku was his only real friend... But why couldn't he tell anyone? It was probably one of those weird adult things again, like when Deku tried to bite his neck. And his thigh. He has really sharp teeth. Deku's pretty weird like that. Oh wait, he already thought that. Well it's true!
Katsuki shook himself out of his thoughts and chanced a peek at the undressing Izuku, who had his back to the boy. Through the corner of one opened eye, the blond could see the black marks crawling up the lightly tanned, sun kissed skin of Deku's spine and shoulder blades. There was a circle on the nape of his neck with a small design in it. Before Katsuki even realized it, he had completely turned his head and revealed his eyes, watching Izuku pulling off his belt, placing it on top of his folded pile of clothes, then moving to undo his pants.
"What did I say Katsuki."
The blond jolted and whipped back to facing the wall, silent.
"You peeked even after I told you not to."
Katsuki's shoulders hunched. 'Is he mad at me?", the boy thought, his bottom lip quivering.
"No, I'm not angry, Kacchan, of course not. This is going to be a normal part of your life; But if I were anyone else, you'd have been in big trouble, 'kay? Maybe you can watch next time."
Katsuki felt that now-familiar hand rub at his tense shoulder and scooting him further up into the tub. The water moved from behind him, and Katsuki was pulled back to Deku's lap. The man tapped his chin on the blond's head, then leaned it back. Katsuki shifted, trying to get comfortable on Izuku's lap, when he made a strange, strained noise in his throat.
Katsuki turned around with furrowed brows and worried eyes. "Are you okay?"
There was a muffled shuffling from behind Izuku. "'M okay, don't worry.", he muttered.
The blond shifted again, this time slower. Izuku shuddered and wrapped an arm around Katsuki to draw him to rest on the man's diaphragm.
"Kacchan, if you're going to keep sitting on my lap, you'll have to stop wiggling around so much.", Izuku breathed.
"Did I hurt you? Are you hurt?", Katsuki gasped, squirming to move off of Deku.
The tall man tightened his arm, once again pulling the boy closer to him.
"I'm not hurt. Not at all, far from it. Just stop moving. Relax."
Katsuki quickly turned to rest his chin on Izuku's lower chest, and watched the man's head roll back with a sigh as he twitched.
The two were quiet, just soaking in the hot, bubbly water, enjoying the feeling of finally being in the other's company.
The blond stared up at Izuku. He was far from what the boy imagined he'd look like, though he wasn't very sure what he thought Deku would look like. Firstly, he was tall. Very tall. One would think Katsuki had known that already, seeing as he's seen Izuku in the classroom and his house. But Izuku had, and Katsuki thought was purposefully, managed to distort his actually height when he was in his shadow form. In Katsuki's room, his figure was combined with the darkness created in the unlit space, leaving anyone unable to see where his height stopped. Everywhere else, he stood directly in the light; It blinded those who looked at him, distracting them from finding out part of his identity.
Deku's hair was white, but not completely. He had streaks of dark green and black mixed in. Not too odd to Katsuki, considering the fact that he's old. And he had freckles on his cheeks. A lot. They were on his shoulders too. Everywhere, really. Down his chest, down, down, down, until the water blocked Katsuki's view.
"Do you know why you can't tell anyone about this Kacchan?"
Katsuki blinked, looking up from where he was staring at Izuku's stomach.
Izuku had opened his former-closed eyes and was looking at him seriously.
"No.", the boy whispered.
Deku had pretty eyes, too. Green and a ring of red around his white pupils with flecks of golds sprinkled inside. Katsuki wondered how they came to look like that. Maybe it's from his quirk-magic.
"Because bad things could happens to both of us."
"Like what?"
There's another mark on his chest, just under his collarbone. A star with a circle around it, and a crescent on both sides. It was weird, but in a good way.
"You, you'd probably have police watching you 24/7, and might not be able to become a 'hero' like you want to." He laughed. "And me? I'd probably be arrested."
Katsuki's head snapped up. "What?!", he cried.
Izuku's hands lifted out of the water and cupped the boy's face. "That's part of the reason why it's important for you to keep the things we do a secret. I could be arrested, and they'd seal my magic. I wouldn't ever be able to see you again unless-" He stopped.
"Unless what Deku?"
"...Unless one or both us died."
One of Izuku's thumbs rubbed Katsuki's cheek, and he glanced away sadly.
"Have you died before?", Katsuki whispered.
A nod. "I've died as many times as the years I've lived."
Deku's other hand drifted down to the blond's shoulder, holding it lightly.
Katsuki leaned into the hand before asking the one thing he wanted to know most.
"How old are you Deku?"
The man paused to think. "...I was alive before quirks existed."
Katsuki gasped in awe. "You're really old."
"Actually, I was alive before dinosaurs went extinct, too. Before they even existed."
The boy blinked up at the oldest person he had ever met. He doesn't look that old at all!
The hand on Katsuki's shoulder lifted to Izuku's chin. "The oldest thing ever recorded is star HD140283 aka Methuselah is estimated to be about 16 billion years old. So I'm... muttermuttermuttermuttermuttermuttermutter... 187.5 times older than that."
"You're being weird Deku."
"Apologizes."
"How much is that anyway?"
That was when Katsuki noticed that Deku's face was getting closer to his.
"I can't tell you yet. You'll have to have someone else calculate it for you."
Izuku got closer and leaned it...