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It was a normal Saturday night.
Iida had managed to convince the rowdier members of the class to play charades in a futile attempt to keep noise levels down, but he hadn't anticipated Mina and Kaminari's...enthusiasm when making their guesses. Sero was exaggeratedly acting out something, but nobody could actually figure out what. Blessedly for Iida's sanity, Bakugou was not in the common room, but much less blessedly, neither was Kirishima. Iida was pointedly not thinking about what the two were doing and where--his focus was presently on attempting to maintain order in his current location.
Yaoyorozu was quietly humming to herself as she made tea, Satou was putting some sort of baked good into the oven, and Midoriya was studying in a corner beside a furiously-scribbling Todoroki and a corkboard covered in photographs, maps, sticky notes, and red string. Uraraka watched over his shoulder, occasionally pointing out connections.
It was a normal Saturday night.
And then Todoroki declares that "I've got it! I've connected the dots! I have found definitive proof that Midoriya is All Might's love child!"
"For the last time, Todoroki," Izuku groans, "I am not All Might's son!"
"Prove it," Todoroki says stubbornly. "You can't."
"I had a father. He died when I was a baby!"
"But are there pictures?" Todoroki asks, raising one carefully-groomed eyebrow.
"I don't know!" Izuku throws his hands up in frustration.
"Ask your mom," Uraraka helpfully suggests. "She's got tons of family photos. You had such chubby cheeks as a baby!"
With a wordless groan, Izuku buries his face in his hands. "I'm literally never speaking to you again."
"C'mon," she wheedles, "indulge us!"
"Fine." Izuku pulls his phone out. "I'll ask." He sends his mom a text--Todoroki is back on his conspiracy theories. Do you have any photos of Dad?
Moments later, his phone pings. No, baby, sorry! I didn't start taking photos until after he died.
Well, fuck.
"No, there's no photos," Izuku says, resigned. "What proof do you want?"
"There's always a paternity test," Mina interjects from across the room. "We could totally do something like one of those reality TV episodes! Who's the father?"
Beside her, Kaminari cackles, his hair sparking.
"No!"
"Yes!" Todoroki's eyes gleam.
"Will it get you to shut up about it if the DNA tests prove you wrong?"
Todoroki smirks. "They won't, but if it makes you feel better, go for it."
Izuku checks the little mailbox with his name on it. Normally, there's nothing, but since he sent off the swabs for the paternity test five weeks ago, he's been checking obsessively. He knows the tests aren't going to prove Todoroki right, but dammit, he wants the proof.
Today, a manila A4 envelope lies innocuously in the cubby. He pulls it out, scanning the return address—yes! The results are in!
He rushes into Heights Alliance, holding the envelope aloft. His classmates are all well aware of Todoroki and his conspiracies, and Izuku made the mistake of mentioning that he actually did the paternity test to Mina, so of course everyone knows about it now. "Midoriya!" Iida calls out, chopping his hands furiously. "Do not run inside!" Unfortunately for Iida, his admonishment comes too late. Unfortunately for Izuku, Iida's admonishment alerts everyone in the common area of his arrival, and he feels eight pairs of eyes laser-focus on the envelope in his hands.
"Are those the results?" Mina asks, vibrating in place. "C'mon, Midoriya, open em up here! We all wanna know!"
Kaminari starts chanting. "We wanna know! We wanna know!"
"I-I'd prefer to do it privately," Izuku protests, scurrying into the stairwell. "Sorry!" Todoroki follows him at a much more sedate pace.
In Izuku's room, his hands shake as he tries to open the envelope. Someone knocks on the door.
"Izuku," Todoroki's smooth voice calls out, "may I come in?"
"Shouto!" Izuku squeaks. "Um. Sure?" The door is unlocked, as usual between the end of school and lights-out when Izuku is inside, and Todoroki lets himself in. He takes the envelope from Izuku and gently, carefully opens it, sliding the documents inside out slightly before handing it back.
"Thank you," Izuku says sincerely. He pulls the results out and skims through the pages.
The color drains from his face as he reads. Todoroki, long since used to corralling his curiosity when it's demanding satiation, watches blandly.
Izuku finishes reading the results and looks up in horror.
"Shouto," he breathes. "What. The fuck."
Todoroki's brow furrows. "What do you mean?"
Izuku doesn't bother responding verbally and shoves the results into the other boy's hands. "Read."
Dutifully, Todoroki reads. In stark contrast to Izuku's developing despair, Todoroki's expression grows more and more gleeful with each word. He lowers the papers. "I knew it," he breathes. "He is your dad."
Izuku bursts into tears.