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Magic Boner Sauce-Unserious Kaisagi fanfic.

Summary:

Kaiser takes Isagi out on a “date”. They get magic boner sauce. They get hard. They fuck eachother.

Notes:

This is unserious, I was never gonna post this and only posted it cause a friend told me to😭

Work Text:

Yoichi was lying in his bed resting his body after a long, grueling training session that he put himself through. He sat up with a groan, stretching his arms above his head and swaying side to side. His bones pop and crack loudly and Yoichi grimaces.

"Damn I sound like popcorn in a microwave.." Yoichi mutters through gritted teeth. Suddenly he hears Michael fucking Kaiser calling out his name in a sing-songy tone. "Yo-i-chiiii!.." Kaiser calls probably with his dumb smirk on his dumb face. Kaiser knocks on Yoichi's door way harder than he needs to. "Yoichi, are you in there?! Are you awake?!" Isagi stays quiet, hoping that maybe he'd just go away. Unfortunately that plan didn't work. "I know you're in there! I could hear your bones popping from my room~". Isagi almost snaps at Kaiser's snarky comment, but he takes a shaky deep breath and gets up from the bed. He opens the door slightly and Kaiser immediately shoves the whole door open, barging into Isagi's room and sitting on his bed. Isagi looks at him in shock, appalled from his audacity. "Uhm Kaiser what the fuck do you think you're doing?!" Isagi exclaims. Kaiser looks up from his phone and smirks a bit. "Oh yeah. I have something to ask you. Can I pretty please take you on a date?" Kaiser says, his tone dead serious.
Isagi blinks a few times, trying to see if he's dreaming...or hallucinating. "Did you just ask if you can take me on a date?..."
Kaiser shrugs like him saying that was the most normal thing in the world. "Uhh yeah I did. Maybe I need to ask it again. "I, Michael Kaiser. I would like to take you, Yoichi Isagi. On a date to a restaurant." He stated calmly with a hand on his chest. Isagi crosses his arms and scoffs. "How funny. Sadly I'm not in the mood for jokes so can you just go-""I'm not joking Isagi." Isagi starts to get annoyed with Kaiser's jokes...atleast he thinks it's a joke.

"Kaiser, seriously. I'm tired and I just want to take a nap.". Kaiser sighs and stands up, putting a hand on Isagi's shoulder who wasted no time shrugging it off. "Listen Yoichi, I'm dead serious. My therapist told me that I should bond with more people so here I am bonding with...you." Kaiser gritted the last words out. Isagi looks at him skeptically and leans forward. "Oh yeah?... and who's this so-called therapist of yours?.." Kaiser smirks at Isagi. "Oh you want his name? Well his name is 'Dream that I had last night that I can't stop thinking about'""KAISER!" "WHAT?!" Isagi groans and clenches his fists. "Stop playing around, I'm not in the damn mood dumbass!" Kaiser rolls his eyes. "Okay okay fine! I want to take you on a date, yes, but not for the reason you're thinking. It's not for anything romantic related, it's just purely soccer." Isagi sits down on his bed. "Oh thanks for telling me I'm definitely gonna wanna go now." Kaiser frowns and gives Isagi an unamused look. "That's sarcasm isn't it?" "Damn right it is."
Isagi stands back up and jabs Kaiser in the chest. "I don't want to go anywhere with you. Soccer related or not." Kaiser scratches the back of his head.

"Yoichi I swear I won't try anything funny."

"You swear?"

"Yes I swear now can we-"

"No, you have to swear on your life."

"Dude what? Don't be ridiculous."

"Swear on your life Kaiser."
".....fine. I swear ON MY LIFE that I won't do or try anything weird."

A few hours later after Isagi and Kaiser get ready, they get to a fancy, opulent restaurant. "Okay Kaiser I have to admit this is pretty nice.." Kaiser nods and goes over to order something. A lady walks out from the back and gives them a soft and practiced smile. “Hello gentlemen! I’m Leonie and I will be serving you today. Just look at the menu on the screen behind me and tell me what you want!” She said, her voice light and cheerful. Kaiser and Isagi look up and scan their options. “ Mmm these foods sound fancy…” Isagi commented. “I think I know what I want…might be expensive though.” Kaiser looks over at Isagi. “What about you?” Isagi puts a finger in his chin and thinks for a bit, looking at the options on the screen. “Uhh yeah I know what I want.” Leonie comes back. “So gentleman, what would you like to eat tonight?” Isagi speaks up first, his tone polite. “I would like…Gyoza, tempura, sashimi, and udon please. For my drink I want some water I guess.” Kaiser stifles his laughter and clears his throat. “Gosh Yoichi are you trying to cast a fucking spell or order food?..” Isagi’s eye twitches at Kaiser’s comment. “I should kill you for that you racist prick…” Kaiser grins and starts to order his food. “I would like a Sauerbraten, Schnitzel, and Kartoffelsalat. I also want some water.” Isagi bursts out laughing. “Dude I think YOU just casted a spell on me!” He continues laughing loudly. Leonie glares at him and claps her hands together, startling Isagi out of his laughing fit. “We would appreciate it if you don’t be so…loud. It can disturb other people…”. Isagi straightens up and nods. “My apologies. It won’t happen again, miss.”

“Thank you sir. Anyways we have this special sauce on the menu that really…brings the heat if you get what I’m saying…” Kaiser and Isagi exchange confused looks before turning back to Leonie. “If it’s spicy just say that…” Leonie sighs, clearly on the verge of losing her patience. “Do you want the sauce or not?!” “Uhhh we’ll take the sauce.” Isagi replies. Leonie nods, signaling Kaiser and Isagi to leave. They go sit down at their table to wait for their food. Once they get their food, Kaiser starts the conversation. “So. I’m just gonna go ahead and say that. I hope you break your ankle while playing soccer.” Isagi stops eating and looks Kaiser up and down. “Excuse me…? So you brought me here to insult me and curse me?! What the hell man?!” Kaiser obnoxiously chews on his food just to annoy Isagi more. “I mean if you put it that way then…yes. Yes I did.” Kaiser smirks. Isagi resists the urge to throw his food at Kaiser’s face. “Okay that’s really shitty…” Kaiser stops eating and stares at his food, coughing a bit. “Damn this is real spicy…” Kaiser coughs even more, his face flushing. Isagi notices and gives him a concerned look. “Uhh you good Kaiser? You need milk or something?” Kaiser shakes his head. “No…I hate milk-okay is it just me or is it getting really hot in here?..” Kaiser fans himself with his hand, panting loudly. Isagi on the other hand also starts to feel a bit hot. “Yeah I do…gosh they really have to turn the AC on..”

Kaiser grabs his water and takes big gulps of it, almost choking on the ice. “This is freaking me out man, I'm burning the hell up!” Kaiser groaned. Isagi puts the cold cup of water on his forehead. “Kaiser you’re gonna burn in hell!” Kaiser turns to him in shock. “What?! What the fuck did I do?!” Isagi’s eyes narrowed. “Don’t act dumb. You swore on your life that you weren’t gonna try or do anything funny and obviously, you lied!” Isagi exclaims. Kaiser gritted his teeth in frustration. “I didn’t do this dumbass! I’m just as affected as you are so how would it be…” Kaiser trails off as he feels a heat pool in his stomach. He looks down and immediately gasps. “Shit I have a boner..”

Isagi’s eyes widen at Kaiser’s cruel language and gives him a disgusted look. “Ugh Kaiser keep that dirty stuff to yourself!” Isagi shakes his head in disgust. Kaiser bites his lip, his leg bouncing hard enough to possibly shake the table. “Gosh Yoichi I haven’t been this hard in a while…it hurts..” Isagi was about to slap Kaiser for his crude language when he looked down to see that he also had a boner. Isagi gripped the table and groaned. “Gosh Damn it….I have one too…I’m going to the bathroom.” Isagi stands up abruptly and scurries off to the bathroom. Kaiser sits there for a moment, contemplating whether he should follow Isagi or leave him to his own devices. After a long thought he decided to just go ahead and follow him. Kaiser gets up from his seat and scurries after Isagi. He opens the bathroom door to see Isagi palming the bulge in his pants. “Gosh Yoichi you can’t jerk off at a restaurant!” Isagi turns his head towards Kaiser hard enough to get whiplash. “I wasn’t even gonna jerk off!” Isagi yells. “Well what are you doing with your hand?..” Kaiser asks skeptically. Isagi sighs and moves his hand away. “Fine. Maybe I was gonna jerk off….,but can you blame me?!” Isagi whined. Kaiser grabbed Isagi’s wrist and pulls him closer until he’s flush against his chest. “Ughn- Kaiser what are you-“

Kaiser kisses Isagi hard and rough, his mouth moving against his with a hunger Isagi has only seen from Kaiser on the field. Isagi doesn’t kiss back. He does the opposite. Isagi pulls back roughly, panting and angry. “Who gave you permission to kiss me weirdo?!” Kaiser tilts his head in confusion. “I thought we were both horny. So we should obviously just y’know.” Isagi gives him an incredulous look. “No! No we shouldn’t?! What the hell made you think that?!” Isagi leaves the bathroom and puts the check on the table, leaving the restaurant. Kaiser quickly follows after him, grabbing his shoulder and spinning Isagi around to face him. “Yoichi I know you want it!” Isagi crosses his arms over his chest. “No matter how horny I get I will never, EVER..relieve it with the likes of you.” Kaiser backs away and rolls his eyes. “Fine then. Let’s go home Yoichi..” Once they get home Kaiser goes into his room and slams the door shut. Looking down at his crotch.

 

“I gotta get rid of this..and I also have to remember to give that restaurant a one star review..”. Kaiser sits down on his bed and decides to try and ignore it. With that not working he starts doing some push ups. He was able to get through about 20 before the throbbing, uncomfortable pain caught up to him. Kaiser threw off his pants and flopped onto his bed. “This has to be histories worst fucking boner..” he muttered. He took out his phone and put on some white noise to try and sleep the arousal away. He connects his phone to Isagi’s headphones (which he stole) and put them on his head. Kaiser laid there for a bit and for a moment it seemed like it worked. 30 minutes later however he still wasn’t asleep. He groaned in frustration and threw the headphones at the wall. “Stupid damn sauce…”. Kaiser sits up and pulls down his boxers, his hard cock springing free from its tight confinements. Just when Kaiser was about to jerk off, Isagi comes in, sweaty and half-naked. Kaiser’s head shot up and he quickly covered himself with his blankets. “Jesus Isagi..learn how to knock!” Isagi quickly turned around in embarrassment. “Well maybe you should’ve locked the door!” They sit in an awkward silence for a moment before Isagi speaks up. “This is killing me…I tried jerking off but I just couldn’t cum…” Kaiser glares at Isagi, “Wow Yoichi, too much information…” Isagi snaps his head towards him. “You are the last person to be talking about “too much information” Kaiser!” Isagi snaps. Isagi sits on Kaiser’s bed. “Listen. Kaiser. We may have to y’know…do the thing.” Kaiser’s eyes widened at Isagi’s statement. “So now you wanna do it? What happened to what you said at the restaurant?” Isagi looks away. “Listen. I don’t WANT to do it okay?! And I don’t want to say that I need to either. But this is uncomfortable and since we’re going through the same thing I guess I can make an exception. But this is the first and LAST time that we are EVER. Doing something like this, ya got that?”

Kaiser nods. “Sure okay I’m fine with that. As long as you don’t get addicted..” Kaiser says in a flirty tone. Isagi ignores his poor attempt at flirtation. “Trust me I won’t. Last time I saw your dick it looked like it was the size of a peaaaohhh my goodness…” Isagi’s words trail off as Kaiser moves the blanket off of his lap. “What? Like what you see Yoichi?~”. Isagi clenches his jaw. “I can already tell this is gonna be the worst night of my life..”. Kaiser cuts Isagi off by grabbing his face roughly and kissing him. Isagi’s body goes rigid at the unexpected kiss but he reluctantly kisses back. Kaiser tilts his head to deepen the kiss, Isagi grabs Kaiser's hair and pulls him closer. Kaiser grabs Isagi’s waist, pulling him into his lap. Isagi sucks on the corner of Kaiser’s mouth causing Kaiser to moan, “Isagi don’t be a tease…I’m hard enough.” Isagi puts his tongue into the kiss earning a moan from Kaiser. Their tongues wrap together hungrily, moving against each other like there was no tomorrow. They both pull back, lips still connected with a string of saliva. “Fuck Kaiser…” Isagi whispers breathlessly.

Isagi and Kaiser pulls back and blink at eachother. They grimace and pull away. “This is disgusting…” Isagi mutters under his breath. Kaiser wipes his mouth with the back of his hand. “Yeah but….i need it.” Kaiser says. Isagi looks at him and sighs. “Fine. There’s no use delaying the inevitable”. Kaiser yanks Isagi back on his lap and Isagi bites his lip. They go back in for another kiss while Isagi sits up on his knees to take off his pants and boxers with Kaiser’s help. Isagi moans into the kiss, feeling Kaiser grip his hips tight enough to cause bruises. Kaiser moves his mouth down to Isagi’s neck sucking and biting the soft skin. “Kaiser…right there…” Isagi gasps out. Kaiser sucks on a certain spot over and over again driving Isagi crazy. Isagi moans into Kaiser’s neck and pulls on his shirt. “What? Want me to take it off?..” Kaiser growls out. “No take your pants off.” Isagi tugs at Kaiser’s pants. Kaiser smirks and pulls his pants and boxers down. Isagi lifts himself up and grabs Kaiser’s dick, trying to push it in. “Damn it. Your stupid dick won’t go in Kaiser!” Kaiser rolls his eyes and spits on his fingers, stroking his cock until it’s nice and wet. “There it should go in now.” Isagi pushes it in and moans. “It feels bigger inside of me…”Kaiser grins at Isagi’s comment. “Is it too big to bounce on Yoichi?~” Isagi glares at him, “You’re making me regret this decision even more.”. Isagi grips Kaiser’s shoulders and moves up and down slowly to get used to it. “That’s it Yoichi..you’re like a natural..” Kaiser places his hands on Isagi’s hips and puts his face in his neck. Isagi whimpers in both pain and pleasure, moving his hands from Kaiser’s shoulders to his neck. Kaiser kisses on Isagi’s neck and trails down to his collarbone, Isagi moans louder, moving faster now that he’s used to the size. “Oh God..it’s like a rod is just banging on my prostate over and over again!” Isagi cries out. “Well my dick might as well be a rod..” Kaiser whispers into his ear. Isagi shivers at the comment and moves faster, the sound of skin slapping against skin echoing throughout the room. “Don’t say things like that Kaiser it’s embarrassing..” Isagi’s hips stutter and he pauses, catching his breath. “It’s too much…I can’t..”. Kaiser nods and pins Isagi to the bed, he leans down to his ear and mutters, “You did so good Yoichi…” Isagi rolls his eyes. Kaiser sits back up and grabs Isagi’s ankles, spreading his legs and rubs the tip of his cock on Isagi’s hole.

Isagi hisses from the feeling, reaching up to grab Kaiser’s wrist, steadying himself. Kaiser looks down at him , “Don’t get romantic with me, Yoichi...”. Isagi moves his hand away slowly. “I’m not getting romantic with you dumbass…” Kaiser grabs Isagi’s ankles and slowly pushes himself inside of him, slyly smirking. He leans down to lick at Isagi’s nipples, lapping at the hardening things. At the same time Kaiser moves inside of Isagi with a quick pace making sure to hit his sweet spot over and over again. “SHIT! Kaiser! This feels great…no-amazing. AHHHH!~ Don’t stop don’t you dare stop!” Isagi curls his fingers in his hair like he’s trying to anchor himself down. He can’t feel this good Kaiser is his rival for god’s sake. But it’s just too hard to grasp onto reality. Every time Kaiser’s cock bangs against his prostate it’s like he’s casting a spell on Isagi’s mind. It’s way too much…way too much to handle, but he’d happily handle it. Kaiser releases the hard nipple and continues to thrust harder into Isagi. His tight walls clenched hard around Kaiser. Kaiser’s breathing comes out heavily from the exertion. Isagi tries to grab Kaiser’s hair but he moves away quickly. “Don’t. I don’t wanna turn this into something more.” Isagi lets his hand rest on the blanket beneath him. “Y-you’re still a stubborn bastard…just let me grab…Nghhhhahhh…Haah haah..im gonna mmmm c-cum soon!” Isagi pants out. He rolls his hips back to match Kaiser’s thrusts. Kaiser gripped Isagi’s knees and threw it over his shoulders so he could drive every inch inside of Isagi and Isagi ate it up. His eyes roll back, making Kaiser think that he’s already done but his finger touches Kaiser’s causing him to flinch. “Keep going, you insane egoist..”

Kaiser grins and picks up the pace pressing down on Isagi’s stomach so he can feel every single inch from base to tip. “UUGH..Fwuuuaaaaahhh! NngKaiser soofmmmucking good!” Isagi’s moans, his words slurring together like a drunken sailor. “You sound so desperate Yoichi..such a filthy little thing aren’t ya’, De-mon King?~” The words sounded mocking. Like Isagi’s title was just a joke to Kaiser and why wouldn’t it be? The so called “Demon King” being pounded into the mattress by his rival? What a joke. “Mnngh! Mmmfp…AHNN! Ahh! Ahh…Ohh my-nnnfh!” Isagi tried to be angry. Tried to curse him out. Tried to fight back. The thing is, he was more turned on. He didn’t know if it was because of that stupid food they ate or if it was because Kaiser was using his own nickname to mock him but he was loving every single humiliating second of this. Kaiser grabs Isagi’s hair just for Isagi to push his hand away. “If I can’t g-grab you, you can’t grab m…Uhggnk…Me…” Kaiser grits his teeth angrily and puts his hand back in Isagi’s hair just for him to shove it away. “I just said-AGHHHH!” Kaiser pulls Isagi’s head back by his hair. Kaiser slows down to an unbearable pace. His cock dragging across the slick walls. “What are you doing?…Stop playing games with me Kaiser I can’t take-“ Kaiser pulls Isagi in for a bruising kiss, “Mmch..mnnk..guh.” They both moaned. Kaiser moved back and started thrusting into Isagi harder. “I’mmn-so close Kaiser..” Isagi whines out, his voice cracking. “What was that?” Kaiser asks. “I-“ Before Isagi could even muster up a sentence Kaiser thrusts faster, “OHHHAAAHH! LET ME SP-MNNNGH!” Kaiser flips Isagi around so that his ass is in the air and he grabs his torso, thrusting in deep. Isagi bites the covers with tears flowing down his face. Isagi isn’t exactly new to feeling this way. He felt bliss before. He felt so good that he cried before. This was different..it didn’t feel like the adrenaline he got from scoring a goal or winning a match. It was as if he was drunk on pleasure that only Kaiser could give him. Isagi wailed and moaned, the sheets doing little to silence him. Kaiser sticks his fingers in Isagi’s mouth to mimic his cock. “Suck Yoichi..”. Isagi didn’t take his time to obey. He sucked and gagged on the fingers like there was no tomorrow. Kaiser pulled his fingers out and groaned. “Look at me.” Isagi looks over his shoulder at Kaiser and bites his lip. They both cum at the same time, looking into each other's eyes. Kaiser collapses onto Isagi, panting heavily into his ear as he slowly pulls out. He rubs Isagi’s side tauntingly and kisses his neck, “I’m so proud..” Isagi looks away from him. “Whatever. Let’s just make this the last time.” Kaiser chuckles. “Fine, fine. Your moans piss me off anyways.” Isagi kicks him. “OUCH! Damn! I’m sorry.” Isagi glares at him,”Tch, you better be.”

-end-