Friends With Benefits Kiribaku

By thisweirdbiperson

5.5K 99 33

One day when Kirishima and Bakugo were training, Kirishima accidentally gives Bakugo a boner. He soon realize... More

A/N
Chapter 2
Chapter 3
Chapter 4
Chapter 5
Chapter 6
Chapter 7
Chapter 8

Chapter 1

877 16 4
By thisweirdbiperson

Kirishima and Bakugo are training together right now. The redhead couldn't help but wonder about his friend though:

"For some reason, Bakugo seems more pissed off than usual."

"Hey Baku-"

Kirishima was cut off by another explosion to his face. He quickly hardens his face and tries to get the blond down to the floor. Bakugo jumps over Kirishima, ready to make another explosion, but before he could, Kirishima hardens his hand to get a good grip on the other and throws him down to the floor. He uses his hardened hands to keep his arms above the blond's head. The redhead stays on top of Bakugo as he tries to break free from Kirishima's grip.

"Baku-bro, you good? You seem angrier than usual."

"I'm fine Shitty Hair, now get off!"

Bakugo continues to try to squirm free, but Kirishima doesn't release his grip.

"Not until you tell me what's going on."

"God Shitty Hair it's nothing, okay?!"

The redhead leans a bit closer and hears the blond groan as he did. Kirishima looks down to see his knee was pressing up to Bakugo's member.

"Kirishima, get off."

This time Kirishima releases his quirk and gets off of him. He could see that he have given the other a boner.

"Great."
Bakugo mumbles, clearly annoyed by it.

"Sorry Bakugo, I didn't mean to."

"Don't worry about it Shitty Hair."

Bakugo gets up and starts to walk away. As he passes the other, Kirishima hears him mumble something.

"This is going to take forever, or should I just take another cold shower."

"What is he talking about? Taking forever and a cold shower?"
Kirishima thought before quickly stopping the blond.

"Uhh, Bakugo?"

"What now?"

"If you don't mind me asking, what do you mean by taking forever and a cold shower?"

Bakugo sighs and looks back at the other.
"Kirishima, don't worry about it."

"But Bakugo, I want to know!"

Bakugo rolls his eyes.

"Look Kirishima, I can't masturbate...because of my quirk."
He got quieter on that last part.

"If you don't mind me asking, then what do you do?"

"Take a cold shower or try to get off by just rubbing against my bed."

Bakugo was clearly getting embarrassed, his face was getting redder by the second.

"Wait...So you have never properly masturbated?!"

"Just stop Kirishima, I'm gonna go."

Bakugo starts to walk off and Kirishima quickly thinks before deciding on what to do with this situation:
"I must be embarrassing Bakugo too much. I could let him go, but this is my fault, maybe I could do something."

Kirishima pushes away any other thoughts and quickly catches back up with the blond.

"Hey...uhh...Bakugo, if you want, I could help you."

Bakugo looks back at the redhead, shocked at what he is saying.

"What?"

"I couldn't imagine not masturbating when I need to, also you're hard because of me, so let me help."

"Idiot, do you realize what you're saying?"

Kirishima nods his head and looks at Bakugo for a reply. Bakugo signs and looks back at him.

"If you want, I don't mind."

Honestly, Kirishima was a bit shocked that he didn't care.

"Okay, so...uhh.. let's go to my room."

That is all the redhead says as he grabs Bakugo's hand and starts walking to his room. The two continue to hold hands the entire way. Once they get there, Kirishima finally lets go of Bakugo's hand.

"Dang bro, your hands are so sweaty."
Kirishima says as he wipes the sweat off his hand.

"I can't help it, it's because of my quirk!"
Bakugo yells back as Kirishima locks the door.

"If you don't mind me asking, what happens when you try to masturbate?"

Bakugo looks away and mumbles again.
"Once the pleasure gets more intense, I can't control my quirk, you can figure out the rest."

Kirishima feels kinda bad for Bakugo, he can't even finish because of his quirk. Then something hit Kirishima.

"Wait so is that why you're so angry all the time?!"

Bakugo's got mad at that comment.

"Fuck off Shitty Hair, that's just how I am!"

Kirishima couldn't help but laugh. He then remembers that Bakugo is still hard.

"That's got to be getting uncomfortable by now,"
Kirishima thinks.

"So Bakugo, you can uhh...sit on the bed."

Bakugo nods and gets on the bed, he grabs his legs to his chest as he waits for the other. Kirishima gets on the bed and comes close to the older boy. He puts his hand on the other's knee and looks back up at him.

"You kinda need to spread your legs for me."

Bakugo looks away embarrassed, but spreads his legs. Kirishima puts his hand on the edge of Bakugo's pants and continues to look up at him.

"You sure you're okay with this?"

"Yes, Shitty Hair."

"Okay then."
The redhead responds as he starts to pull off Bakugo's pants.

He could see the pre cum leaking through his boxers. Kirishima puts his hand on it and starts palming Bakugo through the boxers. Bakugo groans and looks back at Kirishima.

"Get on with it Shitty Hair."

The redhead nods and pulls off Bakugo's boxers. Kirishima could see small burn marks on the blond's member, showing that this is what happens when he tries to do it himself. Kirishima slowly wraps his fingers around it, then at a slow speed, starts moving his hand. Bakugo grabs the younger boy's shoulders and Kirishima could feel him shaking.

"What do you usually like Bakugo?"

"Hell if I know."
He says annoyed.

"Sorry, I forgot."

Kirishima puts some lube on his hand and starts moving his hand faster to see how the other reacts. Bakugo starts panting and gripping Kirishima's shoulder tighter.

"You might want to lay down Bakugo."

The blond nods and slowly leans back against the bed. Kirishima decides to try different things, so he can see what the other likes. The redhead uses his other hand to play with the blond's balls as he continues to move his hand. Bakugo's pants got harder from that action. Kirishima then focuses more on the tip. Bakugo must really like this because he moans out and explodes a bit of the sheet he was gripping. The younger boy focuses on that area a bit more, causing Bakugo to lose his mind.

"Oh god, Kirishima!"
He moans out as another small explosion leaves his hands.

He then moves his hands behind his head, gripping Kirishima's pillow. The redhead moves this hand quickly along with the other's whole member and Bakugo was having a hard time controlling his moans and quirk.

"Kir-Kirishima~!"

"Is it bad to like hearing your best friend moan your name? That was really hot in my defense."
Kirishima couldn't help but think at that moment and he could tell Bakugo was trying to hold back.

"You don't have to hold back Bakugo."

"I don't want it to end yet though."
Bakugo thinks as he closes his eyes and grips the pillow tighter.

"G-gonna cum!"

Kirishima moves back up to the tip, stroking it quickly. Bakugo lets out a long moan with another explosion as he comes. The redhead watches as Bakugo comes down from his high.

"Kirishima."

"Yeah?"

"Do it...again."

"Bakugo I wouldn't want to overstimulate you."

"Huh?"

The redhead forgot Bakugo doesn't know how that feels.

"Look, it would take you a while to get hard again anyways, so let's stop here today."

"Please...Kirishima."

The younger boy was so surprised to hear Bakugo, the Bakugo Katsuki of all people, begging for him. He wasn't about to turn him down.

"Okay, but this time, is it okay if I tie your hands up? You have recked my sheets pretty badly."
Kirishima says with a nervous laugh.

"Whatever, I'll just blow up what you use though. Also, I'll pay for new sheets."

"Don't worry about it, bro."

The redhead says as he gets up to find something to use to tie the other's hands up with. He ends up getting an old belt. He puts Bakugo's hands above his head and ties them up.

"Is that okay?"

Bakugo pulls on it and responds.
"To lose."

Kirishima laughs and backs away.

"Didn't know you liked bondage so much."

"Shut up!"

"I'll leave it like that, I don't want to make your wrists red for tomorrow."

Bakugo rolls his eyes.

"Anyways, want to try something else?"

"Like what?"

"I could finger you if you like."

Bakugo bit his lip and looks at the other.

"Haven't tried that before, so go easy on me."

To be completely honest, the blond did plan to try fingering after his training with Kirishima, so he luckily was prepared for it. Not exactly mentally, but cleaning wise yes. Kirishima nods at what the blond says and grabs the lube. He puts some on his fingers and then some around Bakugo's entrance. Bakugo shivers at this action. Kirishima then slowly starts sliding one finger in, causing Bakugo to groan.

"You alright?"

"It's uncomfortable Kirishima."

"I know, but it will get better."

"Luckily, I know where the prostate is, but I'm gonna let him get used to this first before sending him crazy."
Kirishima thinks as he moves his finger around slowly and watches Bakugo's reaction.

He doesn't want to hurt him at all. Bakugo closes his eyes and focuses on the feeling.

"Can I add another one?"

Bakugo nods and grips the belt. Kirishima slowly adds another which makes Bakugo squirm.

"Kirishima this isn't really pleasurable."

The redhead decides to go hit Bakugo's prostate to show him it can be.

"How about now?"

Kirishima says as he curves his fingers upward. Bakugo's eyes shoot open and he moans loudly, an explosion following it. He slowly rubs that spot. Tiny explosions leave Bakugo's hands and he couldn't control his moans. He tried to move away from the redhead, but he is stuck in place.

"Kirishima stop!"

Kirishima immediately stops moving his fingers and looks up at the blond.

"Are you okay? Do you want me to pull my fingers out?"

Bakugo lays there for a moment panting.

"Sorry, that was a lot to take so quickly. What did you do?"

Kirishima smiles and tries not to laugh.

"I hit your prostate, did it feel good?"

"Too good."

Kirishima couldn't help but laugh a bit.

"Do it again, but slower."

Kirishima nods and starts rubbing against his prostate again, making sure not to go too quickly. Bakugo leans his head back as he moans again.

"It is so cute how he makes the little explosions when getting pleasure."

Kirishima mentally notes as he presses against it a little harder.

"Oh, Kirishima~!"

The redhead slides a third finger in and slowly spreads him, making sure to hit his prostate in the process. He could tell Bakugo was losing his mind, he was moaning like crazy and there was almost nothing keeping his hands up from how much his explosions were burning the belt.

"K-Kirishima, touch the front, w-want to cum~!"

The redhead uses his other hand to move to the blond's favorite spots on his member. Bakugo had officially lost his mind.

"Shit shit shit~! Fuck! Eijiro~!"
He moans as he comes, Kirishima couldn't believe he just moaned out his first name.

Then he remembers how Bakugo didn't know how overstimulation felt. He continues to move his hands the same way he did before. Bakugo bites his lip and tears started forming in his eyes.

"Enough already!"

Kirishima then stops and pulls his fingers out.

"That's what overstimulation feels like."

Bakugo pants as he watches Kirishima undo what was left of the belt.

"You okay?"

Bakugo nods in response.

"So uhh..if you're using my first name can I use yours?"

Bakugo blushes a bit and mumbles.
"Whatever."

Kirishima smiles and jumps on top of him.

"Shitty Hair, you're hard."

The redhead didn't want him to realize.

"Let me help you now."

"No that's okay, it's not the best idea with your hands."

"Who said anything about using my hands?"

Kirishima blushes a deep red. Bakugo gets on his knees and looks at him.

"You just gonna sit there or are you going to get on the edge of the bed?"

"Right."

Kirishima moves to the edge of the bed and Bakugo unbuckles the other's pants. He pulls them down along with his boxers, then he licks up Kirishima's member. The younger boy shivers at the action. Bakugo starts slowly putting him in his mouth. When he gets about halfway Kirishima tangles his fingers in his hair, pushing slightly on his head, encouraging him to go farther down.

"Wow, you're so good at this Katsuki~"

Bakugo responds by humming around Kirishima's member, causing him to get more pleasure.

"Sorry Kat, I'm at my limit, can I mouth fuck you?"

Bakugo puts his hands on his knees and looks up at the redhead. Kirishima takes it as a sign that it's okay.

"Keep your throat open okay? If you need me to stop then double-tap me."

Kirishima grabs a chunk of Bakugo's hair so he can keep him in place. He then starts thrusting in and out. He throws his head back and moans. He continues to do this until he feels himself on the edge.

"Gonna come!"
Kirishima warns then releases in Bakugo's throat.

The redhead pants as he comes down from his high. He didn't realize what he did until Bakugo double-tapped him. He lets go of the blond's hair and pulls out. Bakugo immediately starts coughing like crazy. Kirishima could see the tears streaming down Bakugo's face from before. The redhead gets off the bed and kneels next to the other.

"I'm so sorry, are you okay?"

Bakugo looks up at him and nods. The redhead pulls him in for a hug and he hugs back.

"Hey, Eijiro?"

"Yeah?"

"Do you think we can keep doing this?"

"What?!"
Kirishima yells as he pulls away from the hug.

He was surprised that Bakugo actually still wants to do stuff like this with him.

"It's fine if you don't want to-"

"No! I do!"

Bakugo laughs a bit and slowly stands up. He grabs his clothes and starts to get dressed.

"I'm gonna take a shower, if you want me to ever do something, I will. I'll come to you when I need you."

"Okay! And Katsuki, what does this make us?"

Bakugo turns back around and looks at the redhead.

"For now, we are just friends with benefits, okay?"

"Okay."

Bakugo unlocks the door, but before he opens it, he says one more thing.

"Don't tell anyone about this, okay?"

"I won't."
Kirishima says before Bakugo opens the door and leaves.

"I'll go shower once I hear Bakugo get back."
Kirishima thinks as he looks around his room.

His pillows and sheets are all burnt and there is cum all over them too. He could see sweat marks all over it, and the lube was on the edge of the bed. He couldn't help but smile a bit. What they just did plays back in Kirishima's mind.

"He was amazing, I just want to kiss and cuddle him right now. Wait, friends don't want to do this stuff right? Maybe I don't see Katsuki as just a friend."

Kirishima cleans up the best he can, but then he hears Bakugo's door close. He walks down to the showers. No one else was there, almost everyone was watching a movie. Once he finishes his shower, he walks back to his room and sees that he had new sheets and a pillow.

"Katsuki must have come and switched them out."

Kirishima jumps onto his bed and thinks:
"I can't wait to see what will happen with me and Katsuki."
























Word Count: 2638
Hey everyone, this is my first time trying this paragraph structure. In my last book I got some feedback about it being too close together, so please let me know if this is better. I appreciate any feedback.

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