Chapter Text
“Idia, I love you. But absolutely not.”
Azul had expected his partner to ask him the question for ages now. Idia wasn’t exactly subtle when it came to discussing the kink, as much as he tried to be. It all started with a text a few weeks ago stating “ so, I saw this really weird hentai… ” and the octopus could see where his train of thought was going immediately. And so his answer and explanation were planned out far in advance.
“Why not?”
“Are you insane? If I put my tentacle in that far, it would completely break you.”
Azul had to admit he had a wave of concern wash over him when Idia sent him a hentai with the phrase “belly bulge” in the title. His first assumption was that it was some feederism stuff, which concerning his relationship with his weight, made him fairly alarmed. But when he actually watched the video, seeing that the objective was to have something go so deep inside someone you could see it bulging out of them…
He’d be lying if he said he didn’t need to relieve himself of certain urges multiple times before bed that night.
Regardless, he wouldn’t be willing to entertain actually doing it. He’d shoved his tentacle deep inside Idia before, but well before the point it would become painful. He’d only gone in about 5, maybe 6 inches deep before. So if he had to make an educated guess, Idia had only taken a little over half the full girth of his tentacle. Two thirds if he was being generous. And the further he went in, the thicker it would be.
He shivered just imagining the pain it would cause.
Idia pouted at him.
“I can take it.”
“Oh really? How can you be so sure?”
“I…” He hesitated. He supposed he couldn’t truly be sure. “We can go slow until I can take it all the way.”
He should’ve known that plea would fall on deaf ears. Azul was probably the only person he knew who was just as stubborn as he was. And that was a real problem when they had disagreements like this.
“I may be a bit of a sadist, but I’m not interested in making you break,” was all he responded with.
Idia rolled his eyes.
“Can we at least see if we can do it while you’re human?”
That was an odd request. Azul raised an eyebrow.
“Would that even work?”
“Possibly. I mean… it’s worth a shot.”
Azul sighed. He knew that anatomically this was probably a fruitless venture. Even if they did angle it right, it wasn’t going to be the large bulge like in those hentai videos. Which was why he decided to go along with it. He figured after Idia had been thoroughly proven wrong, it would probably just lead to straight up fucking. And he was more than fine with that. That seemed like a double win for him, after all.
“Very well. Let’s try it.”
As the two stripped out of their clothes, they started to tenderly kiss each other. Despite the fact this was all spurred about by what was essentially an argument, the two stayed fairly gentle with one another.
Azul slowly guided Idia on his back, opening the dresser drawer next to his bed and pulling out the lube. He squeezed a generous amount on his fingers— he figured they would need it tonight.
“You want me to go slow with the prep tonight, Idia?”
“You don’t have to. You can go as fast as you want.”
Azul smiled. Idia was shaking his hips along with speaking, and he also wasn’t stuttering as much as usual. That could only mean he wanted it more than he wanted him to know.
“Trick question.”
“Huh?”
Azul teased the rim of his ass slowly, gathering most of the lube around it before actually thrusting a finger in. Even then, it couldn’t be considered a thrust as much as a light intrusion. Idia squirmed, not even able to let out a moan.
Azul smirked as he prepared him at a painfully slow pace. This was probably his favorite part, when he could make Idia squirm and wish for even more. But surprisingly, he wasn’t begging this time, his moans empty of words. He finally commented when he added a second finger in.
“Why aren’t you saying anything, Idia?”
He looked away, sighing.
“If I ask you to go faster, you’ll only slow down…”
Azul felt a pang of pity, and smiled.
“Hmm… would you be willing to beg if it made me go faster?”
Idia didn’t fully trust he was telling the truth, but went ahead and pleaded anyway.
“Please…”
It was just one plea, but Azul decided he needed to show he was true to his word. He quickly thrust his fingers in, causing him to yelp. He stopped, showing Idia he needed to continue his words if he wanted more.
“Please please please…!”
Azul responded with quick thrusts. Idia continued to scream and moan underneath him.
“Fuck! Yes! Please! Please, I want more!”
Azul abruptly stopped, smirking. He scissored his fingers in and out.
“You want something more, do you?”
“Yes…! Please!”
“Very well.”
He took his fingers out, and carefully lined himself up with Idia’s entrance. The man underneath him harshly breathed in as his dick slowly entered him. They held still, and Azul analyzed their position. If he angled it just right, he might be able to make it work.
“Okay,” he said, “let me know if this feels uncomfortable at all.”
Idia nodded, and Azul started to angle his thrusts as high as he could. He thought he wasn’t gonna be able to do it, but Idia responded meekly.
“OH GODS!”
He looked down to see it kind of happened. He could barely see the head poking his stomach outwards. He twitched, hoping for a split second that he had been wrong. He thrust in again, but the bulge wasn’t as big as either men had been hoping. Idia groaned, excited and still hopeful.
“Fuck! Deeper! Deeper please!”
“I don’t think I can go any deeper!”
He made a groan of frustration. Azul sighed.
“See, Idia? This isn’t going to work the way you wanted.”
“M…maybe I can try with you?”
“Excuse me?”
“I am a little bit… um… bigger. Maybe that’ll help.”
It was true, Idia’s member was larger by about an inch or so. But that could only do so much with what they were trying to do. Azul sighed, pulling out.
“Fine. But don’t be surprised when it doesn’t work.”
Azul lied on his back, and Idia wasted no time hovering over him. He bent down and kissed him gently before grabbing the bottle of lube on the nightstand.
Normally, he’d be painfully slow like Azul was to give him a taste of his own medicine. But he simply couldn’t this time. He thrust two fingers in and wasted no time scissoring him open. Azul groaned, squirming and clenching around him. Idia smirked, but when Azul looked down at himself, he started to feel apprehensive. The bluenette didn’t notice, still smiling.
“Should I put it in you?”
Azul shook his head.
“No.”
Idia apprehensively removed his fingers.
“Why do you say that?”
“I’m not sure it’ll even work with me…” Azul tiredly responded. “...I’m too fat…”
Idia stopped.
“Are you being serious right now?!” His boyfriend lied limp underneath him, and he was incredulous. He knew Azul had a bit of a chunky phase when he was a kid, but he would say something like that now when he was extremely skinny for a man his height?!
Azul covered his face and curled his knees up to hide his lower body. He was too ashamed to cry, and so he merely hid. Idia sighed. Being on top with Azul, or even sex with him in general, was a slippery slope. He never knew what would set him off into some sort of self loathing or depression.
Idia bent down, hovering over him. Azul could feel his presence above him, and he covered his face even more.
“…don’t look at me.”
“No no no. Look at me. You’re not fat, okay?”
Idia tried in vain to pull his hands away, but he didn’t even budge. Realizing that tactic would yield him no results, he ran his hands along his sides. He made sure to lightly trace where his lower torso met his legs.
“Please, I love you. Please stop feeling this way.”
Azul was slowly giving in to the way his hands explored his body. He hesitantly let his legs relax, putting them straight on the bed. Now that his lower body seemed eased of tension, Idia returned his efforts to pulling his hands away from his face.
“Let me see your eyes. You have such pretty eyes.”
Azul finally loosened his grip enough for Idia to finally pull his hands away. But then, he pushed him away, preventing him from getting closer. Idia started to coo again.
“Come on, you’re beautiful.”
“Please, stop lying to me.”
“I’m not lying to you. You’re perfect just the way you are.”
Those words were the things that finally got to Azul. He finally let Idia close enough to place a kiss on his lips, and he sighed, closing his eyes. He kissed back and gently held onto Idia’s body, pulling him closer.
Suddenly, Azul’s legs quivered and they felt like jelly. They fell onto the bed as if they were boneless. His eyes opened wide when he tried to flex his toes, realizing they were merging together. His legs were literally becoming boneless.
“ Shit… ” he cursed under his breath. But it was too late. His legs were slowly splitting apart until they were gone, his tentacles emerging in their place. He tried in vain to push Idia away and cover them with his arms, but with the way they were flowering out, it was impossible to do so adequately.
Then, he stilled, annoyed at his predicament, but begrudgingly accepting of it. He was already lying down when he transformed, and so it would take a great deal of effort to get upright.
Idia ran his hands along his sides once again and smiled.
“See? You’re perfect.”
“You were just waiting for this to happen, weren’t you?”
“Honestly, I was hoping to stall you until the potion wore off, but I don’t think it could have happened at a better time.”
Idia took a moment to consider his partner’s new anatomy in this form. He was waiting for this so he could make his real move.
“...you know, I think we might have better luck in this form. If you still want to give it a try.”
“No. I already told you, I’m not-”
“I don’t mean you fucking me. I mean me fucking you.”
Azul looked down at his body. When he saw his lower half in this form, the only word that came to his mind was large. And big. …and fat. Not to mention what he was proposing was anatomically impossible, even with a dick of a porn star, which Idia didn’t have.
“If you ask me, our luck will be worse when I’m like this. But you can try, if you insist.”
Idia smiled, wasting no time in lining up with Azul’s entrance. Fortunately, in this naturally slick form, he was already lubed up, for lack of a better term.
He inserted himself slowly, and Azul moaned out. He closed his eyes, focusing purely on the sensations down under. He wanted to feel this moment as much as he possibly could, rather than look.
When Idia was fully inside him, he stopped, waiting for Azul to give the go ahead. For about a minute, all that could be heard were the two’s shaky breaths until the octopus let out a long exhale.
“...you can move now.”
With that phrase of permission, Idia pulled out before slamming back in. Azul cried out, and his voice got louder with each new thrust. He could feel Idia angling himself differently every so often. He knew what he was looking to do, and that made him somewhat upset, knowing it wouldn’t happen. But when he was hitting spots he’d never expected him to hit, he moaned with appreciation, unable to object.
Suddenly, Idia moaned out.
“ Azul… look… ” he sounded breathless when he whispered to him.
Azul opened his eyes, looking at Idia’s face. That was the most he ever did. He didn’t want to look at himself, not when he didn’t like the body he was in right now. He gazed up and down his partner’s upper body, continuing to make small moans of approval.
“ No… Azul… look down… ”
He didn’t want to. He never wanted to. But Idia traced his hand down his chest and so he forced himself to look anyway. He let out a sweet whine at the sight before him.
He could see the bulge beginning to protrude from him. Not from his belly, but just below in his lower half where the octopus part of him was. It was bigger than the bulge he’d made in Idia when they were both human, and it was going in and out continuously. He had always felt his partner going in and out of him, but he’d never seen it so intimately.
“Fuuuuuuck, Idia!”
“You glad I wanted to try this?”
“Fuck! Yes! Oh gods, yes!”
Idia reached down to jerk off his hectocotylus in time with his thrusts. His other tentacles curled inwards, the rising heat too hot to bear.
“Oh, fuck! I’m gonna fucking cum!”
Idia got excited, picking up the pace.
“Fuck, yes! Please cum!”
“IDIA!”
“AZUL!”
“YES YES YESYESYES!”
Azul’s hectocotylus trashed as he started to cum all over both of them. He didn’t tighten around Idia, like he did in his human form, but that didn’t really matter. Just seeing him was enough to send him over the edge. Idia came hard in Azul as he finished jerking him off.
When the two cooled down, Idia pulled out, sitting beside him. He was panting hard.
“...did it…feel good? What did it feel like?”
Azul sighed deeply. He should’ve foreseen the tactic Idia was trying to use. He was trying to get him to experience just how good it felt so he would be willing to do the same back to him. But it didn’t seem like he was actually listening to him, and it was getting kind of grating.
“Idia… it’s not that I don’t care about pleasing you. Because I do. You know the reason I don’t want to do it is so I don’t hurt you, right?”