#BkDk A/B/O, mafia AU, just idea Katsuki runs a shop. Not just any...
JoMo@happyrainstone
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May 19, 2026
~3 min read
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#BkDk
A/B/O, mafia AU, just idea
Katsuki runs a shop. Not just any shop. Katsuki is the owner of the best military/gun shop in his town.
His legal business runs amazing. His illegal business? Even better.
One day the door to his shop opens. Katsuki looks up and in his sight is
A/B/O, mafia AU, just idea
Katsuki runs a shop. Not just any shop. Katsuki is the owner of the best military/gun shop in his town.
His legal business runs amazing. His illegal business? Even better.
One day the door to his shop opens. Katsuki looks up and in his sight is
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a person Katsuki would never expect to see in his shop.
Small. Beautiful. Wide hips. Gorgeous. Pink top. Pastel jean shorts that uncover more than cover.
Katsuki is in love.
The person walks to the counter. Katsuki can smell the pheromones.
Sweet. Addictive.
"Hi. I'm here to
Small. Beautiful. Wide hips. Gorgeous. Pink top. Pastel jean shorts that uncover more than cover.
Katsuki is in love.
The person walks to the counter. Katsuki can smell the pheromones.
Sweet. Addictive.
"Hi. I'm here to
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collect my order."
The voice. Melodic.
Katsuki already can imagine this voice moaning his name. Begging for more. More. Harder.
Katsuki has to shake his head and think of his grandma in a bathing suit to prevent himself from popping a knot in his pants.
"Name?"
"Izuku."
The voice. Melodic.
Katsuki already can imagine this voice moaning his name. Begging for more. More. Harder.
Katsuki has to shake his head and think of his grandma in a bathing suit to prevent himself from popping a knot in his pants.
"Name?"
"Izuku."
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Katsuki looks at his register confused. There's no one there named Izuku.
"What did you order?"
Izuku gives specifics and finally Katsuki finds the order. The weirdest gun he ever made.
Small. Pink. Bedazzled.
"Deku."
The omega looks confused.
"Izuku."
"Listen, Deku. Why
"What did you order?"
Izuku gives specifics and finally Katsuki finds the order. The weirdest gun he ever made.
Small. Pink. Bedazzled.
"Deku."
The omega looks confused.
"Izuku."
"Listen, Deku. Why
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do you need a gun?"
Izuku smiles sweetly at him.
"Self-defence?"
That makes sense. Their town is owned by one of the most dangerous mafia families in the country. A little thing like Izuku needs to know how to protect himself.
"Should I show you how to use it?"
Izuku makes
Izuku smiles sweetly at him.
"Self-defence?"
That makes sense. Their town is owned by one of the most dangerous mafia families in the country. A little thing like Izuku needs to know how to protect himself.
"Should I show you how to use it?"
Izuku makes
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wide eyes and with the biggest smile Katsuki ever seen nods his head.
"Yes, please."
Katsuki takes a little thing to the back of his shop. He has a small shooting track there.
Katsuki shows Izuku how to use the gun. How to aim. How to shoot.
Katsuki leans his chest on Izuku's
"Yes, please."
Katsuki takes a little thing to the back of his shop. He has a small shooting track there.
Katsuki shows Izuku how to use the gun. How to aim. How to shoot.
Katsuki leans his chest on Izuku's
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back, whispering words into his ear, pushing his tented crotch into the swell of Izuku's ass. And in response Izuku pushes his hips back, rubbing himself on Katsuki.
They're so close. So close. So good. More. Please more.
"Hey, Bakubro, you're here?"
Katsuki jumps back.
They're so close. So close. So good. More. Please more.
"Hey, Bakubro, you're here?"
Katsuki jumps back.
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This fucker. Why now?
Katsuki looks at his friend with knitted brows. He was so close to the omega he could almost taste his slick on his tongue. And now it's all gone.
"Midobro?" The redhead alpha asks.
"Hey, Eichan." Izuku waves timidly.
"What's going on?"
Izuku looks at
Katsuki looks at his friend with knitted brows. He was so close to the omega he could almost taste his slick on his tongue. And now it's all gone.
"Midobro?" The redhead alpha asks.
"Hey, Eichan." Izuku waves timidly.
"What's going on?"
Izuku looks at
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his feet.
"Kacchan was showing me how to shoot."
Katsuki smiles proudly but to his surprise Eijirou looks confused.
"You mean you were showing him how to shoot?"
What? Why? Why would Katsuki have to learn how to shoot. His the best.
"I was showing him. He bought a gun and
"Kacchan was showing me how to shoot."
Katsuki smiles proudly but to his surprise Eijirou looks confused.
"You mean you were showing him how to shoot?"
What? Why? Why would Katsuki have to learn how to shoot. His the best.
"I was showing him. He bought a gun and
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doesn't know how to use it."
Eijirou looks at Izuku with a frown. And the small omega looks even smaller under his gaze.
"Izuku." there's a warning growl coming from Eijirou but Izuku doesn't look frightened. More like he's pouting like a toddler who has to do something he
Eijirou looks at Izuku with a frown. And the small omega looks even smaller under his gaze.
"Izuku." there's a warning growl coming from Eijirou but Izuku doesn't look frightened. More like he's pouting like a toddler who has to do something he
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doesn't want.
Izuku moves his eyes from Eijirou to Katsuki and looks him straight into his eyes. Not averting his eyes he raises the gun and fires three times.
Every single bullet hits the center. And with every hit Katsuki's eyes go wider.
"Bakubro, meet my younger
Izuku moves his eyes from Eijirou to Katsuki and looks him straight into his eyes. Not averting his eyes he raises the gun and fires three times.
Every single bullet hits the center. And with every hit Katsuki's eyes go wider.
"Bakubro, meet my younger
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half brother. The heir of the Midoriya family. The best shooter in the organization. Viridian Venom.
Small. Petite. Dangerous.
Perfect.
"Leave." Katsuki says to his friend and Eijirou almost runs from the room.
Katsuki is so close to popping that knot in his pants but Izuku
Small. Petite. Dangerous.
Perfect.
"Leave." Katsuki says to his friend and Eijirou almost runs from the room.
Katsuki is so close to popping that knot in his pants but Izuku
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is faster. Bending, holding to the wall, pushing his too short shorts to the side and inviting Katsuki to sink into his heat.
The Midoriyas bloodline is secured that night.
The end.
The Midoriyas bloodline is secured that night.
The end.
