[fic] Certainty
Word Count: 2430
Summary: The twinsâ birthday is coming up, but Belphegor is troubled. (For the Obey Me 2026 Twins' Birthday Collab!)
âWhat do you want to do for your birthday?â The black-haired human quickly turned to look at Beelzebub and Belphegor, her green eyes shining brightly with the cozy, warm lighting of the dining room. Beelzebub paused, the comically large cut of his third steak for tonight halfway to his lips. He placed his fork back onto his plate, his eyebrows furrowing, deep in thought.
Mammon leaned back in his chair, grinning widely. His blue-yellow eyes sparkled as he tapped his index finger against the dining table. âSen, askinâ that to a demon is dangerous stuff, especially on a birthday. Demons get extra privileges when their birthday rolls aroundâŚOUCH!â
Luciferâs fingers were firmly grasped on Mammonâs ear, tugging his brother towards him with a merciless pull. âDo not mind Mammon. Demons celebrate their birthdays as humans would.â
âIt has to be a splash!â Asmodeus chimed in. He held his immaculately manicured hands in front of him, his palms held upwards as he began to describe a scene. âItâs a party! We need amazing decorations, good atmosphere, plenty of demonusââ
âAsmo, itâs the twinsâ birthday, not yours,â Satan curtly cut in. He shook his head slightly, a soft smile playing on his lips at Asmodeusâ exuberance for celebration. âThey may want something more subdued.â
âWhereâs the fun in that?â Asmodeus replied with a huff, crossing his arms in front of his chest.
âNot everybody likes parties, Asmo,â Leviathan mumbled, eyes locked onto his DDD as his fingers furiously tapped the screen.
Sen gently smiled, shifting in her seat again to face Beelzebub and Belphegor. Beelzebubâs gaze turned upwards as he contemplated what he wanted. The gluttonous demon wanted many things, and most of them were food related. Ristorante Six had a new 30 course menu he was dying to try. The local cafe Sen liked just came out with new fruit smoothies and parfaits that promised a tingling experience on the tongue. Barbatosâ desserts were always on his list of things he wanted to eat, even if the demon butler so rarely offered them. The few non-food related things he wanted, they were not exactly the most accessible things, and he couldnât exactly ask his brothers or Sen for them. Especially not Sen.
âI donât know,â he finally replied, his broad shoulders slumped in defeat. He leaned back into his chair, the bulk of his frame causing the dark wood to creak. âIâll have to think about it.â
âThatâs okay, take your time.â Sen placed a comforting hand on his shoulder. She shifted to look beyond Beelzebub to his twin, who was poking at his plate absentmindedly. âBelphie, what about you?â
âDunno,â he replied. âIâll think about it too.â
Sen nodded. âLet us know, okay?â
âYeah,â Belphegor responded. He glanced up at Sen, catching her eyes for a fleeting moment, before his gaze darted back to his dinner. When he looked back up, Beelzebub was now glancing at him. He could see a question in his purple eyes, but his twin didnât ask anything further.
--------------------------------------------------------------------------------
Belphegor kicked one of his numerous pillows surrounding him, his legs restless. His indigo eyes were glued to his DDDâs illuminated screen. Messages lit up the group chat he and Beelzebub shared with Sen.
Sen: âI know you guys arenât sure what you wanted to do yet for your birthdays, but how about cake? Do you guys want a specific kind of cake?â
Beel: âIâll eat anything as long as youâre baking it. What about you, Belphie?â
Belphegorâs fingers hovered over the screen, trembling slightly as he wavered between his decision to reply or ignore the messages. He bit his lip and sighed, putting his phone down and rolling over to put his back to his DDD. He pulled his favorite black-and-white pillow close, breathing deeply as he squeezed his eyes shut and tried to force himself back to sleep.
When sleep came, it came fitfully to Belphegor. He could tell he was reliving that day he was freed from the attic. The all consuming rage burned in his chest, threatening to suffocate him. His hands, circled around Senâs throat, were heavy against the delicate curve of her mortal neck. Her contorted expression of fear â eyes wide, mouth open as she tried to breath, pitiful fingers clawing at his skin â seared into his memory like a brand.Â
He awoke with a startled gasp and trembling hands, slick with sweat. He could smell the pungent iron stench of his fear and anxiety. Belphegor wiped his palms on his pants before covering his face with his hands. He hated not being able to sleep even though he wanted to, but he hated even more the absolute dread pooled deep in the pit of his stomach, coiling around like a viper, seeping poison into his muscles.
While his brothers have ultimately come around to accepting Belphegorâs return in the House of Lamentation, Belphegor was convinced Sen had not. Even if she didnât say it, Belphegor sensed that she looked at him with caution. He couldnât blame her. In her eyes, he was a monster that tried to kill her. He couldnât compete with his twin, a brilliant sun that warmed those around him with his gentle presence. Of course Sen would fondly look to his twin, not him.
He sighed. He felt Beelzebubâs growing attachment to Sen. He noticed how much time they spent together. She appeared in their shared dreams. They were friends. Itâs natural for friends to ask each other what they wanted to do for their birthdays. Belphegor believed he had no place to even answer what he wanted for his birthday.
So why did Sen ask him?
Belphegor threw his pillow into the wall of his pillow fort, the strike launching dozens of squishy squares in different directions. He stared at the scattered pillows and let a strangled, frustrated sigh escape his lips. A momentâs silence hovered in the attic room with him.
He crawled over and grabbed his pillow, encircling it with his arms and crushing it against his chest. He fell onto his side and buried his face into the pillow as he felt his eyes sting.
---------------------------------------------------------------------------------
Beelzebub wiped sweat from his brow as he entered the foyer of the House of Lamentation. Before he saw them, his nose picked up on the heavy rose-laden scent of Asmodeus, and the delicate vanilla scent of Sen. Both were huddled by the staircase, quietly whispering to each other. He heard only bits and pieces - âMammonâ, âhoneyâ, âprince.â A subtle scent of iron wafted from above.
âHey,â Beelzebub greeted, waving at them.
âOh!â Sen cried, startled. âBeel, hey. How was your jog?â
Beelzebub noticed Sen had quickly locked her phone, shifting its screen so it faced her chest as she turned to face him.
âGood. I think I worked up a good sweat.â Beelzebub raised his tank top to wipe sweat beading on his collar bone, exposing his abs. Sen diverted her gaze to a spot beyond his shoulder.
Asmodeus chuckled. âYou always do, Beel. Every time youâre out running my Devilgram feed is absolutely littered with pics of you from the students at RAD. You really should start up a fitness Devilgram~!â
âI tried DeviltubeâŚâ Beelzebub started. Asmodeus silenced him with a wave of his finger.
âAnd you didnât do anything on it! Mammon and I had to post for you just to keep you in the algorithm! Maybe dear Sen here could help at least with Devilgram. She knows her way around a camera.â
âAh, Iâm just alrightâŚâ Sen protested.
âNope! Nuh-uh! I donât want to hear it from those pretty lips of yours!â Asmodeus patted her back, gently nudging her slightly towards Beelzebub. âYour portraits of me were so stunning my followers could not get enough of it. Donât sell yourself short, Sen!â
âYeah. Donât sell yourself short,â Beel agreed, smiling widely.
âOkay,â Sen replied, crossing her arms in front of her. She bounced her left toes gently against the wooden floors of the foyer, a soft tinge of red dusting her cheeks. Just as quickly, she dropped her arms to her side and asked, âBeel, do you and Belphie have a preference on where youâd like to spend your birthday tomorrow?â
Beelzebub brought his hand up to his chin as he thought. âBelphie will probably want to stay at home. I donât mind where for myself. As long as itâs with everybody.â
The iron scent tickled his nose again, and Beelzebub felt a disconcerting tingle in the pit of his stomach. As if trying to answer, his stomach growled loudly like a deep cavernous beast. He brought his hand to his stomach, clutching it gently. âIâm gonna go grab a snack. Have you guys seen Belphie today, by the way?â
Sen shook her head. âI havenât seen him at all.â
âNot since this morning when I caught him napping in the planetarium,â Asmodeus added.
Beelzebub felt a sense of unease with his twin, but nodded. âOkay. Got it. Thanks.â
---------------------------------------------------------------------------------
March 11.
Belphegor cracked open his eyes to Beelzebub hovering over him. His twin blocked the dim light of the lamp in the room with his broad shoulders.
âHappy birthday, Belphie! Do you want me to carry you downstairs?â
âHappy birthday, Beel.â Belphegorâs lips parted into a small smile. âItâs cool. Iâll walk a bit.â
Belphegor stretched his legs and arms, hearing the joints crack slightly. âGetting old, I guess.â He let out a laugh. Beelzebub laughed heartily in return.
âOf course. Stretching helps.â
âNo thanks,â Belphegor replied with another chuckle. He sat up on the bed.
âBelphieâŚâ Beel started, watching his twin rise.
âYeah?â
â...Are you doing okay?â
â...Yeah.â
Beelzebub decided to leave it at that. Whatever was causing his twin distressed, it was clear Belphegor had no intention to speak about it today. He would ask him again tomorrow.
The twins left their room and entered the eerie silent halls of the House of Lamentation. Usually, they would have heard at least some semblance of life after walking down the halls, but it was as if nothing lived there with them. Beelzebubâs eyebrows furrowed as he looked around.
âWhere is everybody? We would have heard Lucifer or Satan by now, I think,â Beelzebub muttered.
âIt is strangely quiet. Think Levi got his hands on a cursed visual novel again?â Belphegor asked.
Their DDDâs simultaneously chimed, and both demons pulled theirs out to look at it. In the group chat they shared with their brothers, there was a picture of the planetariumâs starry sky relief sent by Mammon. A cryptic message, to be sure.
Beelzebub glanced at Belphegor. âWhat is this? Why did Mammon send this to us?â
Belphegor rolled his eyes. âMaybe heâs cursed.â After a brief pause, Belphegor added, âWe might as well see what happened. I bet he tried to sell some of Satanâs booksâŚI kind of want to see what punishment heâs receiving.â
Beelzebub nodded, and both demons pivoted in the direction of the planetarium. When Beelzebub opened the door, there was a loud POP! that made both of them jump.
âSURPRISE!â
Belphegor and Beelzebub blinked as they took in the sight in the planetarium. All their brothers were there, smiling widely and holding party poppers. Simeon, Luke, and Solomon were standing up from their seats, clapping. Several long decorated tables were set up with seats, and the widest variety of foods imaginable graced the tablecloths. In the middle of the centermost table, 3 large birthday cakes shaped and decorated like Hellâs Kitchenâs hamburgers sat. Next to them sat a more modest, but equally as decadent, white and black cake.
Beelzebub was the first to react, his eyes taking in every single bit of food. He began to drool, but quickly wiped it away with his sleeve. âWow!â
Sen appeared in front of them. âHappy birthday, you guys!â
âSen, did you make this all yourself?!â Beelzebub asked excitedly, his eyes locked onto the array of food in front of him, his nose bombarded by the delicious scents.
âNo, I had help.â She smiled, and shifted to the side to let the stars of the show enter. âI made the cakes with Luke, and Barbatos helped with the other desserts. In fact, his connections are why weâre able to have so much foodâŚa lot of top demon chefs cooked things for this!â
âBarbatos and Lord Diavolo are busy, and could not come. But, they send their well wishes,â Lucifer added, handing Beelzebub and Belphegor each a glass of demonus. Their eldest brother smiled. âHappy birthday, Beelzebub, Belphegor.â
âCome on! Letâs eat!â Mammon exclaimed, pushing Belphegor to the table. Beelzebub was already there, quickly piling a mountain of food on his plate. Belphegorâs stoic face hid his surprise at the party. He seated himself at the table, shifting to get comfortable.
As the party commenced, and Beelzebub began to vacuum up the food on his plates, Sen placed a piece of the white and black cake in front of Belphegor. âHere, Belphie,â she said, pulling back.
Belphegor picked up a piece of cake with his fork and brought it to his lips. His eyes widened slightly as he chewed, recognizing the flavor. âWhite chocolate?â
Sen nodded. âWhite chocolate and a bit of dark chocolate. It took a bit to get used to, but thankfully Luke and Barbatos helped me out with this since I was coming up with this recipe on my own.â
âOn your own?â Belphegor asked, his indigo eyes studying Senâs features for sincerity. She nodded, and Belphegor felt his chest tighten.
Beelzebub leaned over to them, his mouth stuffed with pasta. âThad looks gud!â he said through large mouthfuls of food.
âBeel, chew your food!â Satan laughed, eyes crinkling as he sipped his demonus.
âAlso, I guess Iâll start,â Sen said, bending down to grab something from beneath the tables. In her hands were two gift-wrapped packages. She handed one to each twin.
Beel tore into his immediately. âThis isâŚâ The demon rose in his seat, holding several documents in his hand. âTickets to the Fangol Ultra Bowl! And near the front?!â
He rose and hugged Sen tightly, lifting her from the ground. âThanks, Sen!â
Belphegor opened his gift, finding it to be a luxurious fleece-lined blanket hoodie. When he unfurled it, it stretched to the ground. The corner of his lips trembled.
âSen.â
Sen turned to Belphegor, catching her breath after the bone-crushing embrace from Beelzebub. Belphegor reached out and held her hand.
He looked up at her, his anxiety slowly melting away. He smiled broadly. âThank you.â
âOf course.â Sen placed her other hand on his. âHappy birthday, Belphegor.â















