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Risu was months into his devil training and had been experiencing countless physiological changes to his mind and body. He began to develop cravings for greasy food, a sudden desire to buy luxury items, and his confidence and ego were indistinguishable from each other. But there was one change he wasn't expecting that embarrassed him. All he could think about for the last few weeks was sex and nothing else. He tried ignoring it as he went through the hell that was devil training but he still found himself having grotesque desires. He spent some of his nights masturbating but nothing seemed to satisfy him and he was left feeling pent up to the point of becoming physically painful.
Asu had noticed Risu was acting strange and asked him what was up but Risu deflected the question and did his best to convince Asu it was just mood swings combined with his exhaustion. After some time though, Asu realized what was going on. Having already gone through devil training once before, he was used to the changes and was able to recognize the source of his friend's discomfort. Risu was sitting on his bed trying to hide his erection, but looking over him Asu could see it clear as day. Risu realized he wasn't able to hide it anymore and got to the point. "Asu…can you help me…please?"
Asu sighed and reluctantly agreed to help him out. "Fine. I'll give you a quick hand job but that's it." He got on his knees and unbuttoned Risu's pants and took his cock out. Satan…How is he this erect? He may as well be a devil already with the size of it. Of course these thoughts were a bit of an exaggeration, but the sight of such a thing on a seemingly regular magic user's body was certainly unique. Fully developed devil cocks are hidden in a fleshy, moist, protective slit that secretes lubricating mucus and pheromones. The cocks themselves are incredibly large compared to a human or magic user's, and have a distinct appearance with massive veins that run over their surface and angular, sometimes sharp, tips for better penetration. Devils only reveal their cocks during sex and hold their image in high regard, as it fuels their massive egos to have an organ so distinct from other creatures. Risu's cock was was definitely that of a devil in training; throbbing with blood flow, it was nowhere near the size of an actual devil's, but the size compared to his body managed to catch Asu off guard. Its distinct devilish shape was alluring and the smell of pheromones was arousing. One notable feature of it was Risu's pubic hair. Up until this point Asu had assumed he was a brunette with bleached hair, but it turns out Risu has naturally blonde hair with streaks of brown that swirl through it.
After a minute or so of staring Asu cupped the head if Risu's cock with his tongue and began licking, slowly going from small, gentle licks on the tip, to long, slobbery strokes from the base to the tip. Occasionally he'd stop licking to massage the tip with his thumb. Once he went back to licking, Risu planted his hand on the back of Asu's head and attempted to shove his cock down the man's throat, but Asu kept his neck stiff. "If you do that my teeth will cut you!" Asu snapped looking up at him. Risu's grip loosened and Asu continued. He placed his lips around the head and took a couple inches in his mouth, moving his head up and then back down with every inch, careful not to let his sharp teeth cut Risu. Once he got about five inches in his mouth Asu gained rhythm and rolled his tongue with each movement of his head, stopping occasionally to gently suck. Every little motion caused Risu to moan and exhale in satisfaction. Asu began moving faster, lifting his head and widening his throat as he went down so he could take the last few inches. He'd get all the way to the base then went back up, opening his mouth about halfway up the shaft to let his tongue stroke Risu. The sight of Asu's head moving up and down his dick, on top of the stern glare he was being given made Risu's head spin. It felt so good. Asu's mouth was just wet enough, his throat was just wide enough. It made Risu want to cum right then and there just to see Asu's expression change as he was forced to swallow all of it. "Fuck! Asu-'' Risu was cut off as Asu removed his dick from his mouth, leaving a trail of spit that connected the tip and his lips.
Standing up, Asu began to take his shirt off "Lay down". Risu obliged and, to make things a little easier, removed his pants and boxers, leaving him in just his white t-shirt. Asu climbed on top of the bed, straddling his friend's waist. Risu's eyes were full of lust. He couldn't get enough of the sight in front of him. His mind raced with all the different positions he'd stretch Asu's small body into, all the ways he'd fuck him, all the noises he'd get out of him. He was physically drooling and pulled Asu towards him. "Hey!" Asu said pulling himself back "Slow down. I still want to enjoy this at least a little." He leaned over Risu, putting his hands on the mattress to support himself. Risu grabbed him a little less aggressively this time and began kissing and sucking on Asu's chest and shoulders. His hands traced his back, feeling the giant crucifix shaped scar, until he reached Asu's ass and began fondling it. Asu had been pretty much silent this whole time, while Risu was groaning with each grope and lick. He began nibbling and sucking on Asu's nipple, tracing its outline with his tongue before sucking on it and biting it gently. Asu remained quiet and he was thankful Risu couldn't see his face contort with the pleasure of hickeys being left on his chest. He was now marked by Risu. A mark that was so distinct and unique from all of the scars scattered across his torso. The sight of it all was making Risu impatient. He wanted more. He grabbed Asu's waist and began guiding it over his raw cock. A small gasp escaped Asu's lips. He went along with it and rubbed his hardening cock against Risu's full, devil-like erection. By this point Risu had his hands down Asu's pants, feeling his asshole and caressing his tail with his fingers. Asu seemed to enjoy having his tail played with, as every time Risu rolled his fingers over it his hips bucked a little.
Asu broke away from Risu's grip and got up to take the rest of his clothes off. Risu took this opportunity to take his shirt off, but not before staring and tracing Asu's figure with his eyes. Upon seeing his cock, Risu felt a little relieved to know that the new shape his cock had taken on was also happening to Asu. His wasn't so big though; it was more proportional to his body so it was a bit smaller than Risu's.
Risu adjusted his position on the bed, getting on his knees and sitting farther up near his pillows. Asu positioned himself in front of Risu, bending over onto his hands and knees. His tail was up and flicking around slightly in anticipation as Risu gripped and spread his ass, enjoying the sight of his asshole. Suddenly, Asu felt a sharp barb enter him, flinching at the sensation of it traveling deeper inside. Before he knew it his rectum had been stretched wide by Risu. It was painful. It hurt so damn good. Risu began thrusting in and out quickly. He could feel Asu's insides so vividly, almost as if his dick had fingerprints. His mind was racing and he was panting like an animal, digging his fingers deeper into Asu's hips until his sharp nails had broken skin and blood was shed. The painful pleasure Asu was feeling was immeasurable. He gripped the bed's wooden footboard; he could feel a thick lubricant shooting inside of him. It went from a dry, tight pain that left his asshole feeling raw, to a slick and smooth sensation that soothed the pain. The newly wet environment excited Risu and he quickened his pace as the fluid began seeping out of Asu's asshole, leaving thick and sticky trails dripping down both of their thighs.
Asu had managed to remain silent except for a few gasps and small groans up until this point. He refused to make any noise for Risu. He didn't want to give that kind of satisfaction to another devil. Risu noticed this though, and despite not fully understanding his new devil mindset yet, he could feel himself becoming more and more satisfied and felt his ego being fed when Asu submitted to him. In a last-ditch effort to get some moans out of him, Risu grabbed the horn that had sprouted from the top of Asu's head and tugged it as hard as he could. Asu let out a loud whimper and gripped the footboard harder, digging his claws into the wood. "Louder" Risu commanded as he tugged the horn again and plowed Asu's ass harder with each thrust, making sure to graze his prostate with the barbed end of his cock every time he went back in. Asu was moaning louder and louder until he was basically screaming while he gasped for air. Risu grabbed the base of Asu's tail and stroked it up and down in a similar motion he'd perform if he was jacking a cock off. The sensation tingled and traveled all throughout Asu's body, making him whimper and groan even louder as he pressed his ass against Risu's waist, moving his hips up and down to stimulate his prostate even more. "Good boy~..." Risu encouraged before pulling his cock out. The unexpected stop made Asu whine and buck his hips back at Risu, thinking it was over.
Suddenly he felt that distinct barb enter one last time thrusting straight into his prostate as Risu pushed Asu's head down aggressively by the base of his horn, but still gentle enough that Asu didn't meet the footboard face first. Asu shrieked as he felt pleasure spark all over his body, gripping the footbard so hard it began to crack and splinter in his hands. He could feel it in his trembling legs, his back, his foggy and tingling head. But most importantly he could feel an incredible release in his cock as he came harder than he ever had before. Cum shot in thick, sticky streams all over the bed and splattered back up to his chest and stomach. Suddenly he was pulled up by his horn with his back now against Risu's front. He was slid up and down a few more times by Risu to get the last moans out of him before cumming in his ass. Asu was snapped out of his daze as he felt streams of cum hitting the walls of his rectum, making the both of them groan and sigh deeply. Risu held Asu as he pulled out. Heavy drops of cum were leaking out of Asu's asshole and Risu resituated the both of them, now lying chest to chest with their cum still dripping and stuck everywhere.
They were both exhausted, panting and drenched in sweat. After calming down Risu slipped his tail around to greet Asu's where they intertwined tenderly. Neither of them were used to showing this kind of affection to each other, or anyone for that matter. They were always too busy bickering and tormenting one another - well it was mostly Asu who was doing the tormenting with Risu trying not to kill the little fucker - . They were an unlikely pair that, at the beginning of this encounter, hadn't planned on actually enjoying each other. They still hated each other though…just in a more sexually charged way. Maybe they were overthinking this whole thing. Either way, Nikaido will be happy to know they didn't kill each other during training. She doesn't have to know the details of how they managed it though.