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It's not gay to fuck your best friend right?

Summary:

Tsukasa goes to Rui to help him with his sex problems with his girlfriend. Rui suggests an idea that piques Tsukasa's interest.

Notes:

Yippeee I got it done!!! (´∀`) I finished this wip first because I was already almost done with this anyways. Well enjoy Tsukasa's Bi awakening!

(See the end of the work for more notes.)

Work Text:

“Sorry for coming over so suddenly.” Tsukasa slipped his shoes off by the door of Rui's workshop. 

 

“Don't be, I enjoy your company.” Rui simply smiled. 

 

Tsukasa felt guilty, terribly guilty for so many things lately. The main one, and the reason why he came here, was his girlfriend. She was a really nice and sweet girl and it's not like Tsukasa didn't find her attractive and his feelings did grow yet lately they just vanished out of thin air. 

 

“So, what happened?” Rui sat down on his chair while Tsukasa took a seat on the couch that wasn't cluttered for once. 

 

Tsukasa took a deep breath in. "So, as I told you before, I was losing interest in my girlfriend…” Tsukasa waited for Rui to nod before continuing, "and recently we've had sex. She had been thinking about it lately and we've been dating for a year so I figured maybe if we did something gentle like that where we can make love rather than just fucking then I could see how much I really love her but… “

 

Tsukasa went quiet, as if he's trying to say it but can't. Rui noticed this. “It didn't work?" 

 

“It was worse than just not working, I didn't even cum, Rui." Tsukasa groaned and shoved his face into his hands. “I felt so fucking terrible after that. She felt bad that she couldn't make me cum and started blaming herself and really she didn't deserve that. I was able to reassure her that it was okay and that all that mattered was that she felt good and I even stayed the night to comfort her but… Ugh… I don't know what to do.” 

 

“I feel like the answer should be a bit obvious, break up with her. I know it's going to hurt her but it's better than playing with her heart, Tsukasa-kun.” Rui said bluntly. 

 

To be fair Rui was right, he was just going to hurt her more. He can tell her tomorrow it's way better than just doing it over text. Plus Tsukasa wasn't a coward, he should at least be there for her if she needs it. 

 

“You're right. Still I can't believe I couldn't even cum… How did I even manage that!? The world is definitely against me…”

 

Tsukasa looked over at Rui who was thinking it over. "Usually being stimulated like that is more than enough for a guy to ejaculate but… Maybe you didn't enjoy the position you were in?” 

 

The gears in Tsukasa’s head started moving only to turn, get stuck, and start smoking. "What do you mean..?”

 

“Maybe you'd prefer being on the receiving end is what I mean. I know it's still weird you didn't cum from being stimulated like that and I'd probably look it up since it's completely beyond me but… Your body may just not like being the one doing it.” Rui's explanation definitely was a little strange to him but maybe he was right. 

 

Still how could he prove it though? He gave Rui one intense look… Rui is his best- no dearest friend, so theoretically if they had sex to see if Rui was right it would be fine, right? It's not like it's a crime to have a dick up your ass. 

 

“Can you uhm.. Help me then..?” Tsukasa asked with a slightly flustered face. 

 

Rui's face was redder than his, which was understandable. “Ah.. Well… There's no harm in it right?” 

 

“Yeah! As long as we both consent to it then it's completely fine.” Tsukasa said to reassure his friend and himself. 

 

Rui went to search through his drawers and pulled out a bottle of lube. “Wouldn't it be a better idea to keep that in your room instead of your workshop..?" Tsukasa asked as Rui walked over to him. 

 

“There's no harm in getting off in my garage. Besides, I'm in here more than my own room.” Rui got in between Tsukasa's legs and sat the lube next to him.

 

Tsukasa felt a little awkward taking off his pants and boxers, after all he's only ever been shirtless and that was due to it being way too hot during practice. Not to mention they were literally about to have sex… 

 

Rui hummed and was about to kneel down but Tsukasa stopped him. “W-wait! You're not taking anything off?" 

 

Rui tilted his head. “Hm? I didn't know that Tsukasa-kun wanted to see my body~” Rui teased. “I will happily comply then." 

 

Tsukasa huffed as Rui stripped himself of his shirt. "It's not fair if I'm the only one naked..” Tsukasa mumbled. 

 

He got some lube on his fingers and spread Tsukasa's legs just a little more. “Open up just like that for me..” 

 

Fuck 

 

Tsukasa felt those words go straight to his dick. How in the hell did he get hard from that!? Let alone from his best friend! What makes it worse is that his girlfriend could just barely get him hard and all Rui needs to do is say some corny line that you'd find in a hentai or something. 

 

Tsukasa shivered at the cold sensation against his ass. He could feel Rui teasing his rim or maybe just warning him that he's about to shove his fingers in. 

 

Rui carefully prodded at his hole and then slipped it inside. 

 

Rui's fingers were long, Tsukasa already knew this but he never really thought about it. Tsukasa could feel his fingers rubbing deep inside of him and if Tsukasa didn't cover his mouth the garage would be filled with moans. 

 

“Let's see.. What if I press down here?" 

 

Tsukasa threw his head back as his eyes widened, earning a chuckle from the other male in between his legs. “Did that feel good Tsukasa-kun~?” He had that stupid teasing grin on his face which only caused Tsukasa's face to redden even more. 

 

“Of course it did…" Tsukasa mumbled into his hand and held it on his mouth tighter as Rui started teasing that spot. 

 

“Come on now, no need to be embarrassed about your noises. I can reassure you I won't say a word~” Rui was lying straight through his teeth and Tsukasa knew that. Rui would take any opportunity to tease the poor blonde. God he was never gonna hear the end of this was he? 

 

Rui added a second finger making Tsukasa wince and tense up. He was met with a soothing shush and felt Rui rub his thigh softly. He gave it a minute of rubbing that spot before spreading his fingers, making Tsukasa let out a cry. 

 

Rui started scissoring him open with his fingers, watching closely how Tsukasa's hole opened up oh so perfectly for him. 

 

Tsukasa arched his back as Rui spread his fingers as far as they could go, letting out an amused chuckle at Tsukasa's reaction. “Seriously, your reactions are so good… How could I not want to tease you like this?” 

 

Tsukasa couldn't even respond as Rui started thrusting his two fingers into that one spot, finally hearing Tsukasa's moans. 

 

Tsukasa decided to look for once, it wouldn't hurt him to see how Rui's taking this all in-

 

Oh, oh gods 

 

Rui never looked this good with a smirk on his face. He seemed so interested in how Tsukasa took his fingers in. That look in his eyes was just killing him… The way Ruis bangs just barely covers his pretty yellow honeyed eyes… not to mention the way he fucks his fingers into that spot. All of this is enough to push Tsukasa to the edge however Rui decided that Tsukasa didn't deserve that. 

 

“Now, now, we can't have you cumming just yet, Tsukasa-kun.” Much to Tsukasa’s dismay Rui pulls his fingers out. The blonde whines at the loss which earns a smug grin from his director. “My, my Tsukasa-kun… Do you like being filled up that badly? Ah… No wonder why you weren't able to get off when having sex with your girlfriend.” 

 

Tsukasa quite literally couldn't speak, trying to process the fact that Rui almost made him cun from barely anything. It didn't help watching tease him while taking off his pants and boxers. Yet when they finally came off the blonde's throat went dry. Kamishiro Rui, a single male who spends all day in his garage working on his robots, the Kamishiro Rui that is so focused on his shows, the very same Kamishiro Rui who has stated before that he's never had sex and isn't really interested in that type of stuff, has a massive fucking dick. It was actually stupid how big his dick was. Tsukasa might as well pull out a measuring tape and see if that thing can even fit inside of him! 

 

Maybe his director really is a sadist…

 

“Tsukasa-kun, you're staring at it so much. Are you surprised by the size, hm?” Rui teased. To make it even worse this bastard decided that he was going to rub his cock against his own, only making their size difference more evident. 

 

Now, Tsukasa was pretty confident in his own size. He was right on the line of six inches which was something he was proud of. He didn't have a monster sized penis and he'd argue that he was probably average size for most men so he had no reason to feel discouraged by such a size. 

 

Seeing Rui's massive fucking cock made him feel a little… Embarrassed..? But maybe that's because of how it looks compared to his own. “So cute… Tsukasa-kun looks so small…” Tsukasa just barely heard Rui, as if he accidentally let those words stumble out of his mouth. Now Rui's eyes were locked with his, honey yellow eyes meeting his sunset orange ones. “It almost makes me feel bad for wanting to take you like this…” Rui's hands move to take off the blonde’s shirt, his finger tracing Tsukasa’s more toned chest and down to his stomach. “I wonder if your stomach will bulge from how big my dick is…” Rui lets out the laugh he always has when he plans to subject Tsukasa to his whims. “Can I see how your body will take me, Tsukasa-kun?”

 

“He looks like he wants to devour me, maybe I'm a little out of it but… I'm not against being Rui's prey…” Tsukasa gulped down his nervousness and lifted one of his legs to give more access to Rui while looking like a more appetizing meal. “Try not to rearrange my guts with that… thing okay?” Tsukasa gave Rui his consent. Future Tsukasa would be screaming at him right now. 

 

Tsukasa shivered, feeling something pressed against his entrance. It was cold and hot? Oh wait, it was Rui's tip and damn did it already feel big. He was a little curious… How deep will Rui reach? Could he really make his stomach bulge? Secretly he finds himself wishing he does.

 

Tsukasa can feel his insides being ripped in half as Rui slips his cock inside. Rui feels much bigger than he looks. How in the hell does this man walk around with such a big cock while still being a virgin!? Hell Rui could probably make a living out of being a porn star! 

 

Tsukasa gripped the cushions until his knuckles turned white, it wasn't easy taking something like this inside of him. 

 

“There we go… You're such a good boy… Look at how well your small body is taking me~” He cooed and pushed impossibly deeper. “I'm almost there, just keep being my good boy and take me even deeper…” 

 

Tsukasa came, he came all over his stomach in front of Rui, the same Rui with a stupidly massive dick and the same Rui that was his dearest friend. It was even more embarrassing the way he moaned, it was so erotic that made Tsukasa consider an acting career in pornography.

 

“Hm? Tsukasa-kun… That's no good, I didn't even shove the rest inside and you already came? Hehe~ I wonder.." Rui leaned down, his breath hot against Tsukasa's ear. “Was it my cock that made you cum or was it my words♡?” Rui nibbled on his ear and suddenly Tsukasa let out another erotic moan as he felt Rui slam the rest inside of his ass, stuffing the blonde full of cock, but not just any cock, no Tsukasa wouldn't allow that, it was Rui's cock stuffing him full. That thought already got his blood flowing right back to his dick. 

 

“You're so obvious Tsukasa-kun…” Rui pulled out slightly and then slammed back inside. “You really like being fucked don't you? At this point we don't really need to continue anymore do we? After all we were doing this to see what you preferred more but… I'm just a bit greedy, I want to see how you'll react when I cum inside of you… Ah and-” Tsukasa screamed as Rui's cock hit his prostate, “I love watching my cock move inside of you…!" Rui sounded a little too excited saying that but unfortunately Tsukasa was only getting turned on even more by it. 

 

Tsukasa looked up at Rui, he looked like he had gone insane from being inside of him. Rui… Ah Rui… Tsukasa doesn't think just any cock fucking him stupid is going to satisfy him, to get him hard and needy. No it has to be Rui fucking him, it has to be Rui splitting him open and saying literally anything to him. Rui could explain why his body is reacting in such a way and it would only turn the blonde on more. It's not his fault, Rui's the one who always had a naturally attractive voice so of course when he says sexual things it's going to make it ten times better. 

 

“Tsukasa-kun is so quiet… He usually always has something to say but now he's- fuck- being a good-” Plap, “obedient-” plap, “little bitch for me to fuck.” Rui grunted as Tsukasa's hole clenched around Rui's cock. Rui could only laugh as he leaned over and forced Tsukasa's eyes to meet his. “She'd never make you feel this good, no one will ever make you feel this good.” 

 

“R-Rui fuck wait- I'll cum again-” Tsukasa was cut off by his own cries as Rui started fucking him harder. 

 

“Good, keep cumming around my cock like a good boy, okay? We can stop once I'm satisfied.” Rui sounded so mean… But Tsukasa liked that, he loved how mean Rui was being to his body. 

 

Tsukasa gasped as Rui's hand found its way to his dick and started jerking him off. “ Ruii- Please-” Tsukasa let out a choked sob as he came again yet Rui didn't plan on stopping. In fact Rui kept jerking him off and fucking harder into him. 

 

“You really are such a good boy aren't you? You always do as I say even when I request some of the most mundane stuff from you… I used to just assume it was because you wanted to become a star yet… I'm wondering if it's because you just love being praised by me.” Rui smirked. “It's adorable, Tsukasa-kun… Doing whatever I say because you want me to praise you~”

 

Tsukasa probably would've snapped at him if Rui hadn't fucked his brains out. Maybe Rui was right, who in their right mind would ever agree to anything Rui has thrown at him just in their pursuit to become a star? Rui's praise always made him feel giddy anyways… 

 

Tsukasa arched his back as Rui slammed harshly into his prostate. “Rui-! Ngh- R-Rui cum- p.. Please cum in- Mngh Rui♡!” 

 

Rui chuckled and started jerking Tsukasa off faster. “Cum in? Ah~ Tsukasa-kun wants me to cum inside of him… Very well then, I'll fill up your insides with my cum.” With that Rui desperately started chasing his own orgasm, quite literally destroying Tsukasa in the process. 

 

The only thing Tsukasa's brain could spew out were “Rui” and “please” since Rui decided he was going to fuck his brain out of him. Even if Rui wasn't as rough as he was with his body, Tsukasa still would've been out of it. Despite his eyes being blurred by his tears Rui looked so hot, his eyes were burning into his own. Not to mention Rui's voice… Fuck he was definitely hard again… 

 

Rui moved his hands to grip tightly onto Tsukasa's waist, bruising his skin as he came inside the blonde, moaning his name. Tsukasa could only moan and whine as Rui filled him up. 

 

Rui pulled out of his destroyed hole, cumming leaking down onto the couch. “Ah… Tsukasa-kun you're still hard~? Hehe~ I can't let our troupe leader deal with this by himself now can I?" 

 

Tsukasa looked at Rui with a hungry look in his eyes. Yeah they were definitely going to be fucking until one of them passes out…




                                       ☆☆☆




“I'm terribly sorry for leading you on, you deserved so much better.” It was the next day and Tsukasa was at the rooftop with his, now, ex-girlfriend. “I'm sure things will be awkward between us now but if you ever need something I'll happily be there for you, you're a very sweet girl and I'm sure whoever you'll date next will be very lucky.” 

 

The girl smiled, it was a sad smile which made Tsukasa feel guilty. “It's fine, I understand. I'd rather end things now then make you feel obligated to date me.” She said, “The same goes for you, you're a really sweet person Tsukasa. I hope you'll be able to find someone who will treat you right.” 

 

Tsukasa let out a small laugh. “You act as if you weren't a good girlfriend. It's not your fault that my feelings started to fade away, really. So please don't think any of this is your fault, I'm the one who should take the blame.” The girl went to speak but Tsukasa quickly cut her off. “Nope! I won't let you think badly of yourself! You're an amazing girlfriend and I'm very clearly not worthy of your time, so whoever you date next better treat you better!” Tsukasa declared and then smiled. “I need to get to class, if you ever need anything I'm here okay?”

 

His ex gave up and nodded. “Right… Same here! Maybe we can still stay friends." 

 

Tsukasa liked that idea, she was a kind girl and he definitely wouldn't mind staying friends with her. 

 

However the same can't be said about Rui since the moment he got to class there was a note on his desk by Rui who wasn't even paying any attention to him, instead working on one of his drones under the desk. 

 

“There's this new place that opened up near the arcade that has some good ginger fried pork, a good place for a first date, no?" 

 

Tsukasa blushed and grabbed a pen. 

 

“Yeah, just give me a time and date.” 

Notes:

Hope everyone enjoyed their food!! I'm focusing very hard on my wips rn because I have something very very special planned for everyone hehehe. It's a secret but let's just say it may have more than just one or two chapters heheh

Anyways now that I finished this it's time to focus hard on another wip! I will make sure to feed the Ruikasa fandom as much as possible!!

 

(I'm about to start printing out your guys comments and hang them up on my wall TωT)

Also more praise kink Tsukasa please I love praise kink Tenma Tsukasa 🙏🙏🙏🙏

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