Reader Insert Collections

It had only been the first day of the “field trip” to Lord Diavolo’s palace and shit had already happened. You were pulled into that blasted painting and were chased by Levi’s old pet snake. Day two consisted of running around with Solomon and Asmo during the scavenger hunt and dining on celestial food prepared by Simeon. Once everyone had finished Diavolo snapped his fingers causing a dress to appear on your body and people appear in the halls. The ball had started. Mammon immediately approached you, his cheeks flushed. 

“... Yo, (Y/N). Um, like... you know... Uh, I mean, like... uh...” You smiled as you watched him studder. “L-like, you’ve gotta have weird tastes to ask a human like you to dance. I’m guessin’ no one here’s gonna do that, huh?” He laughed nervously and continued. “... So, y’know, as long as you don’t have a partner, I guess I could maybe go ahead and pair up with you for a li’l bit.” Just as Mammon finished Satan chimed in.  

“Mammon, why not just admit that you want to dance with (Y/N)?” He asked and shook his head. 

“You’re such a loser.” Levi said with an obnoxious laugh. “And a total tsundere! People are sick of characters like that! Didn’t you get the memo?” You watched as Mammon's face turned red with embarrassment.  

“Get outta here, both of you! Shoo, Shoo!” He growled before turning to you and offering a hand. You were about to take it when Lucifer roughly grabbed you. 

“(Y/N), come and dance with me. Now.” You gazed back at Mammon as Lucifer dragged you away. You could hear the last part of their conversation. 

“See, you should've just come out and asked (Y/N) to dance.” Satan sighed. 

“That loser was rejected! Awesome!” You hear Levi laugh and your heart sank. You would have to find him as soon as you freed yourself from Lucifer. 

 Once on the dance floor Lucifer asked, “Do you know how to dance?” You rolled your eyes at the question. 

“Of course I do. I also know manners, unlike you.” He snarled at the snarky comment.    

“Wonderful. Then I don’t have to explain things.” He gripped your hand and pinned you against his body. “In general, there are all sorts of reasons why one might ask someone else to dance.” He paused to spin you around, pulling you back into his chest. “For example, they might be interested in them, they might want to touch them, or they might simply be doing it out of politeness.” He stopped and glared down at you, “Or, it could be because they want to have a private conversation.” 

“Just get to the point.” You seethed. “I have much better things I could be doing right now.”  

“What are you plotting with Asmo (Y/N)?” He growled in your ear. “Let me make it clear: I respect my brothers’ freedom to do as they wish. However, if I ever sense that you’ve become a threat to either Diavolo or us… then I will absolutely show you no mercy. Understood?” You tried to shake free of him, glaring in his direction. 

“Will you now?” You hissed back, a sneer forming on your face, “I’m sure Diavolo wouldn’t be happy if you hurt his precious exchange student, now would he?” His grip momentarily loosened giving you time to rip your hand out of his. You gave a mocking bow and headed back into the crowd to find Mammon. 

Unfortunately, you ran into many demons who wished to talk and dance with you. As you danced you searched for a head of white hair in the crowd. He was nowhere in sight. The night was dragging on when you finally escaped the crowd and made it to a balcony. Leaning against the railing you let out a long sigh. You thought back to the remark that Levi made as Lucifer dragged you away. That loser was rejected. As much as he tried to hide it, you saw the look of hurt on Mammon’s face. Your heart twisted just thinking about it. The brothers were often cruel to Mammon in your opinion. Sure, he had some flaws, but all the brothers did. You sighed again and looked down to the courtyard. There were less demons down there, just a few couples taking advantage of the privacy for slow dancing. Out of the corner of your eye you caught a flash of white. It was Mammon. He was standing alone leaning against the railing staring out into the vast darkness of Devildom.  

You hurried down the steps, hiking up the silk purple ball gown that had magically appeared on your body when the ball started. Just as you rounded the corner to enter the courtyard you ran directly into a demon. 

“I’m so sorry!” You apologized and backed up.  

“So, you’re the human.” The demon hummed and took a step closer to you.  

“Uh, yeah.” You replied, his gaze making you uncomfortable, “I’m sorry, but if you’re going to ask me to dance, I’ll have to decline.” You tried to skirt around him but he stepped in front of you yet again.  

“Your soul smells so good.” He took another step towards you. “There’s no one out here, I should eat you right now.” Your eyes widened as your back hit the wall. Fuck. Mammon said to always run but that wasn’t an option this time. Demons had the same anatomy as humans, right? You decided to take your chances. With one swift kick your foot came into contact with his crotch. Bingo. As he bent over you took off running towards where you saw Mammon. You looked back to see the demon chasing after you. Fuck. The heels you had on weren’t helping with your speed. The combination of looking back and the heels made you trip. You squeezed your eyes shut waiting for the impact that never came.  

“(Y/N), I thought I heard ya over here.” Mammon said as he hoisted you up. “What-” You cut him off.  

“Demon, chasing,” was all you could huff off between breaths. Instinctively Mammon pushed you behind him.  

“Give me the human.” The demon growled as he approached Mammon.  

“Fat chance of that.” Mammon snarled back, stepping out of the shadows. “If you touch her, I’ll make sure ya die a slow and painful death.” When the demon saw who it was he was talking to, he took a step back.  

“M-Mammon, I-” The demon began to grovel.  

“Get out of my sight, now!” Mammon boomed. That alone was enough to make the demon turn tail and run. Turing back to you Mammon grabbed your arms and inspected you. “Are you alright? He didn’t hurt ya did he?” The concern in his voice was enough to make you smile.  

“I’m fine Mammon,” You replied, “If anything he’s more hurt then me. I kicked him in the balls.” You laughed as Mammon’s eyes went wide at the statement. “Well, he had me pinned to the wall. I knew I couldn’t run so I improvised.” He shook his head at the thought. 

“What the hell were ya doing walking ‘round alone in the first place? I thought you were dancin’ with Lucifer.” He looked away during the last part.  

“I was looking for you.” His head snapped back, his eyes wide. “I was wondering if you wanted to dance with me?”  

“I-if I wanted to dance? W-with you?” He stuttered, a blush forming on his cheeks. The sight brought a large smile to your face. 

“Yeah! If Lucifer hadn’t pulled me away, I would’ve said yes.” You smiled brightly, “Even with your roundabout way of asking.” Stepping towards him you wrapped your arms around his neck. His blush only deepened. He stuttered some more before finally resting his hands on your hips. Butterflies fluttered in your stomach as you began to sway back and forth to the rhythm of the music. This was what you wanted. To be with Mammon. He had stolen your heart early on during your stay at Devildom. You saw him in a different light then his brothers. He was the guy who was always there when you need him, always there to talk. It had only been a short time, but you were utterly in love with him. Many times, you considered telling him how you felt but it never came to fruition. You knew that he loved you, you knew that it would work. You also knew you were self-destructive. The relationship you had now was good enough. You’d literally slept in the same bed together, cuddling him all night long. If there was any chance that he didn’t feel the same way, your relationship would never be the same. You weren’t taking the chance. You wanted him to say it first. And, you knew that that would never happen. But in this moment, gazing into his content eyes, his body against yours, you couldn’t hold back.  

“I love you.” You confessed. You gazed at him, wanting to remember the look on his face forever. First it was genuine surprise. A second later, realization. And finally, a large and bright smile appeared on his lips. His eyes were radiant as he pulled you into a tight hug. The butterflies stormed inside your stomach as he pressed his lips against your shoulder.  

“I love you more than money.” He murmured, lips brushing against sensitive skin. The phrase would seem like the most douchy thing someone could say in the human world. But here, in devildom, from the Avatar of Greed himself, those were the most amazing words you’d ever heard. “Say it again.” he mumbled into your shoulder. Your smile grew.  

“Mammon, I love you.” He hummed contently as you ran your fingers through his white hair. He pulled back and gazed intently in your eyes. His hand brushed against your cheek before tilting your chin, leaning towards you. 

“HEY! THERE THEY ARE!!” You sighed and rested your head against Mammon’s chest. It was Levi. 

*Insert dance battle* 

“Mammon, what are you doing with (Y/N)?!” Satan yelled, rushing up to the two of you. Levi followed suit and even tried to pull you and Mammon apart. Mammon held firm and smirked at the brothers. 

“(Y/N) just told me she loved me.” Those words were enough to start one of the worst arguments you had seen so far. 

After lots of arguing amongst the brothers about who you loved more, Lucifer finally showed up. “That is enough arguing. You’re being childish.” You could hear the anger dripping from his voice. “Mammon, you obviously started this so you will be punished-"  

“I started it.” You stepped in front of Mammon and took on Lucifer’s death gaze. 

“You do not need to lie for him (Y/N), we all know you would never tell him-” You cut Lucifer off by grabbing Mammon’s shirt and pulling him into a sloppy kiss. It wasn’t the way you wanted your first kiss, but it was more than enough to shut the brothers up.  

“How’s that for proof?” You said, annoyance dripping in your tone. The brothers' jaws were on the ground, including Mammon’s. “Now I’m taking Mammon back to The House of Lamentation,” you grabbed Mammon’s hand, “So we can be alone, you know, to have sex.” The boys were silent, apparently too shocked to argue. You smiled wickedly. “Don’t follow us.” No one moved. “Good. Now Mammon lets go.” You had to drag Mammon away from the group, apparently too shocked to move. You smiled at the thought. Suddenly you were jerked back as Mammon came to a sudden stop. “Hey-” You were cut off by Mammon’s lips pressing against yours. His hand slid to your lower back as he pulled you against him. In no time his tongue was in your mouth, his kisses reducing you to a whimpering mess. You ran your hands down his bare chest, eliciting a moan from Mammon. It was music to your ears. One of your hands rested on his chest while the other made its way towards Mammon's neck. He pulled away from the kiss, finally out of breath. Your back hit a tree as Mammon easily hoisted you up. His lips continued downwards, his warm breath caressing your shoulder. Mammon reached a particularly sensitive spot and focused on it, eliciting a moan from you. His teeth scraped against your skin as your hand made it to his hair. Your hand grazed his horn evoking a grunt from Mammon.  

“They’re sensitive?” You breathed. Mammon stopped you from touching them.  

“We have to get to a bed for ya to find out.” He said before giving you a wicked smile. “Hold on.” Suddenly you were in the air, high above the ground.  

“MAMMON!” You yelled as you clung to him. 

“Don’t worry.” He murmured into your ear. “I won’t drop ya.” You smiled and kissed his cheek, peppering kisses along his jawline.  

In no time you were back on the ground and at the House of Lamentation. Mammon carried you to your room, easily closing the door behind him. He set you on the bed and stopped. “Are you sure you want this (Y/N)?” Mammon questioned, worry and anxiety in his gaze. “Are you sure you want me?” Those words made your heart hurt. You didn’t realize how deep his brothers goading really went. You stood up and approached him. He didn’t move as you guided his hands to the zipper on your dress.  

“There isn't anyone one else in the human realm, the devildom or the celestial realm that I want more than you.” Those words were more than enough to reassure Mammon that you in fact wanted him. You felt the cool air on your back as he unzipped your dress, the fabric soundlessly falling to the floor. Mammon’s breath hitched as he took in your form. The only word that came to his mind was stunning. He had been wanting this for so long, never once thinking it would happen. He hoisted you up and easily carried you back to the bed. You pushed him against the headboard and straddled him. He blushed as you ran your hands along his chest.  

“You don’t know how long I waited to do this.” You grinned as he began to stammer. Grabbing both his cheeks you kissed him. “I love you, Mammon.” He rested his hands on your hips as he kissed you while running his hands down your back, his nails sending shivers down your spine. As things became heated you could feel his erection. Your hands slid up his shoulders and found their way into Mammon’s hair, just barley grazing one of his horns. Mammon hissed as you gripped his horns. He groaned as you began to grind against his erect cock, moaning your name as you began to stroke his horn. Mammon didn’t know what to do with himself.   

“Fuck (Y/N).” Your insides knotted at the fact you were so easily able to please the man you’ve wanted for so long.  

“I want to make you cum.” You whispered into his ear. You reached down with your other hand and began to rub his cock through his pants. His hands squeezed your hips. You moaned at the thought of his cock inside you. Fuck. Your insides began to throb. “Mammon,” Your breaths were ragged, “I want you inside me.” You reached down and unbuttoned his pants. Mammon tugged them off his hips, his boxers following suit. You bit your lip at the sight of his erect cock. In a flash Mammon had your bra unclasped.  

“You’re so sexy.” He murmured, the sight of your bare chest reducing him to a mumbling mess. Reaching down you grabbed onto his cock. Mammon groaned and squeezed your breast. You hand started at the top, thumb brushing the head of his cock. You could feel his cock twitching as you began to pump.  

“Fuck (Y/N), I love you.” He moaned as he kissed your shoulder. You guided his cock to your entrance and slowly you lowered yourself down, stretching to accommodate his girth. You slowly began to move back and forth, pain dissipating. Your body jerked as Mammon began to play with your clit. 

“Fuck.” You moaned as he found the right spot, Mammon knew what he was doing.   

“You feel so fuckin’ good (Y/N).” He purred into your ear, making you melt into his touch. “But I can't let you do all the work.” You tried to steady yourself by grabbing his horns. Mammon’s free hand grabbed your ass and began to thrust into you, his fingers working your clit.  

“Mammon,” You moaned his name, “Fuck me harder.” Mammon obliged as his flipped you onto your back, beginning to pick up the pace. “I’m gonna cum.” You moaned, your back arching in anticipation. Mammon grabbed hold of the headboard to steady himself as he thrust harder, your insides twisting as his skillful fingers played with your clit. “Mammon!” You moaned his name as you felt yourself coming undone. Mammon braced himself by grabbing the headboard as he began to fuck you harder. Faintly you could hear the splintering of wood as Mammon’s thrusts became erratic as he came inside of you. Mammon collapsed on top of you, his breaths ragged. Sloppily he kissed your neck, leaving small bitemarks in their wake before pulling you on top of him.  

“I love you so much (Y/N).” He murmured, nuzzling into your neck. “I never thought you’d feel the same way.” You sighed contently and ran your fingers through his silky hair.  

“Hopefully now your brothers will leave us alone-” Just as you were about to finish your sentence the door to your room burst open. Mammon quickly pulled the covers over your naked bodies.  

“THEY ACTUALLY HAD SEX!” You heard none other than Asmo cry. 

“No. Way.” Was all Levi could say. You clenched your teeth, not believing that they actually barged into your room without permission.  

“Get the fuck out. Now!” You yelled before grabbing the mug on your side table and pitching it at them. They easily dodged it.  

“See, (Y/N) loves me more than all of you!” Mammon bragged while pulling you closer, eliciting a growl from the other demons. You rolled your eyes at the comment. But apparently that comment was enough to make them leave.  

“Ugh, they’re so annoying sometimes.” You groaned causing Mammon to laugh. Getting up from the bed you quickly locked the bedroom door and headed towards the shower. Looking back at Mammon you asked, “Round two?” Without a moment's hesitation Mammon was out of bed and carrying you to the shower.