DISCLAIMER: Kohei Horikoshi is owner/creator of BNHA. This is just pure humor and satire-ish crack I came up with.
AUTHOR'S NOTE: Based off The Bob And Tom Show... yeah, I'm weird.
"Konnichiwa, and welcome to Spit-Take Theater. Today's episode: Three very close friends from U.A. High School's Class 1-A are part of a secret and very exclusive club called the 'I Slept With Deku' fan club."
"Hello, Kota," fifteen year old Eri Midoriya greeted her cute best friend Kota Izumi as she closes her Deku-themed laptop.
"Morning, Eri."
Technically it was thirty minutes to eleven am, but Kota tends to sleep in on the weekends. Kota went to the kitchen area, grabs two apples and a drink before heading to the sofa.
The two teens sit together in the common area of the dorm, with Eri surfing channels until she stops on one playing twentieth and twenty-first century anime shows. Currently playing was Mobile Suit Gundam W.
"We the only two of Class 1-A who didn't go to the theaters, then?"
"Looks like it," Kota answers, having already polished off one apple and went for the second apple.
Eri looks to her friend as in two minutes he devoured the fruit.
"Have you seen the latest episode of Survivor?" she asks.
"Kinda. I'm only watching because aniki is on the show with Uraraka-san and Asui-san. I'm certain he's sleeping with both girls at the same time."
Eri smiled in a manner that tells others she knows a dirty secret.
"Izu-niichan's in a committed three-way relationship with the two girls."
Kota stares at the cute white-haired girl.
"What? Really?"
Eri nods. "Yup."
"Huh. Guess he swings both ways."
"What do you mean?" Eri inquires, a puzzled look on her face.
"Aniki took me camping one time when I was thirteen. It was just the two of us getting away from the city, deep into nature. One minute we're talking about what's going on in life..." Kota glances to Eri who goes for her drink. "The next minute I'm on all fours in the tent."
Eri spits her iced sweet barley tea.
"You had sex with oniichan?"
Kota nodded, blushing as he recalls the erotic adulterous intimacy with his aniki.
"At least there was a calm river nearby to clean up."
Eri looks back to her glass held in her hands. The teen smiled to herself.
"One time during summer, I was twelve and hanging out at oniichan's apartment while mom was at a business trip in Okinawa for three weeks." Eri glances at Kota as he takes a sip of his tea. "He pop my cherry."
Kota spit-takes. Eri giggled, blushing brightly.
"Izuku-niichan loved me everyday during my stay."
Kota stared at his best friend, blushing.
"So, basically, we are the only other two who's in the 'I Slept With Deku' fan club?"
"Yeah, sounds like it."
As Eri and Kota clink their glasses then take a drink, their third friend suddenly ninja'd up behind them.
"Make that three," says the little sister of the Rainy Day Hero: Froppy.
Scared spit-take.
They spun around staring at the raven-haired girl, who was smiling and had a cute blush on her cheeks.
"Tsuyu-neechan allowed me to join her and Uraraka-chan getting some sweet loving with Midoriya-kun on Christmas eve last year," Satsuki Asui informs her two friends.
Eri and Kota stared in shock from the information. They thought they were alone. Guess not. Satsuki flips forward and plants herself between her friends on the sofa.
"So, you two wanna call and ask Deku for some giggity?" the girl suggested.
"This has been Spit-Take Theater. Sayonara."
A commercial starts playing on the TV.
"It's the most outrageous video, since the last outrageous video-"
But the channel is changed to something else. Sitting on the sofa together were eighteen year olds Izuku and Mei Midoriya. They are at their apartment in Tokyo, of Earth Dimension MH-2148, watching interdimensional cable.
"Well, that was a plot twist," said Mei, surfing through infinite cable channels.
Izuku looks to his two months pregnant wife. "Want to go visit Gohan and Videl?"
The TV turns off. "Yeah. Bored of TV now."
Izuku puts on the sling bracelet and one portal later the couple left their universe.
CAUTION: Some Rick and Morty xover-ish. :P