Work Text:
There’s a well-known legend among the Three Realms about two princess twins, daughters of Lucifer Himself, the ruler of Hell that it’s said that their beauty is equal to their mischievous and ‘sadistic’ sides.
Everyone in Hell knows about their King’s little soft spot is filled by his beloved and adored daughters, born on a bloody night and so they were found, full cover in blood and not crying, like many newborns would, and just smiles and stare back at the King. That’s the only time that Hell’s inhabitants have ever seen their King crying and holds someone so dearly and carefully as his daughters.
Growing up, the twins started to show their different personalities:
Tenn, the oldest one, is cold and calculative with her magenta sharp eyes and light long pink hair. Her smiles are truly rare to see, at least if not around her adored sister, and she’d deliver happily any punishment that her father would asks from her but she’d torture humans, angels and demons as well if even one precious tear fall from her twin’s eyes.
Riku, the youngest one, is like the opposite of her sister but she’s the most dangerous one: she’s manipulative, using her frail health too to her advantage, and the most sadistic one.
She’d cling and sit on her sister and father’s arm and lap, drinking and feast on her preys’ blood while smiling and giggling like a little kid, tattletale on traitors and spies, whispering in her father and sister’s ears just for thrill of it.
“Tenn-nee!” A cheerful voice calls out while there’s some running. “Tenn-nee!” She calls again.
“Riku,” Tenn chimes while smiling and turning. “don’t run and be regal.”
Riku hugs her, smiling before leaning towards her ears. “I found an amazing info, a sweet one too.” She whispers. “There’s a demon that it’s going to usea dirty trick to hurt Daddy, my maids told me that they’re gonna to strike for us first and then for Daddy.” She giggles while leaning back.
“Oh~ is that so?” Tenn smirks while caressing her cheek. “Good job Riku.”
Riku continues to giggles before noticing the otherdemon in the room and her smile turns into a sadistic glee one. “Is that a new prey?”
“All for us.” Tenn replies with the same smile. “Dad told me that it’s a reward for being good.”
Riku squeals before walking towards him while the demon back away, knowing that when thetwins has that smile and twinkle in their eyes means that their time has come.
“Please!… Please…” He begs while backing away.
“Riku,” The older calls her half but a cruel smirk is enough for the demon to not hope for saving. “don’t be messy with our food.”
Riku let out a little moan while nodding. “I’m so hungry…” She whispers smiling while her amber eyes glows with a red tint.
“Now what I told you about being messy?” Tenn chimes a little stern while looking at her sister.
Riku’s mouth, chin and cheeks are dirty with blood but there’s still a childish smile on her face, not looking apologizing at all.
“Sorry Tenn-nee~” She giggles before letting the demon being thrown in the fire, not bothering to cover her naked body up.
Tenn shakes her head and rolls her eyes fondly before taking a napkin from the nightstand and cleans her little sister but stops and starts to lick it clean her cheeks, moaning at taste of blood.
Riku giggles before laying back on the bed, taking Tenn with her, and she lowers to bite her neck to drink her blood.
Drink blood from blood relatives isn’t something seen like incestuous on human realm, siblings can feed from the other ones and parents feeds their kins in order to deep and enforce their bond, just a platonic and pure act of love and care.
“You two are insatiable like always.” A male voice comes in.
Tenn removes herself to look and see her husbands.
“And you always came in without permission.” She replies annoyed while cleaning her mouth with the back of her hand.
Gaku rolls his eyes, feigning annoyance, while Ryuu chuckles and Touma just stays silent.
In contrast to her sister, Riku still has one husband and contractor while Tenn has two, all of three were and are their personal royal knights so it was bonus points to gain their trust.
Riku lays her face on her sister’s chest and Tenn starts to caress it.
“What about that demon I asked you to deal with?” Riku asks while looking at her husband.
“Wait for your Father’s sentence, my princess.” Touma replies while bowing his head a little.
“Silly Touma,” Riku calls him close with a hand and does so. “you’re my husband now and you shouldn’t bow your head like that before us anymore.” She says while keeping his face in her hands.
She shivers a little when some cramps comes and Tenn let her go.
“Take her back to her room and have some fun.”
She calls closer her husbands with her finger and, when Touma takes Riku and covers her with the blanket, they both crawls in the bed, covering their wife almost completely.
Tenn’s smirks was the last thing before the door closes behind them, leaving the throuple to their privacy.
“Ah~ ah~” Riku moans can be heard while she rides him expertly.
There’s one more fact about the princesses and it’s their hunger for sex that it can ‘dominate’ a little bit from an occasional fuck with their victims while feeding on their blood but filled completely by their contractors and husbands.
“Truly an insatiable demon.” Touma smirks while taking her hands and rising to kneel, causing Riku to lays back a little and moans more loud.
“Too… deep~” She moans while he starts to move fast. “Yes~ yes~ don’t stop Touma~”
Riku’s petit form is truly ‘easy’ to manipulate and move to his pleasure, letting him to have the full control on her.
Touma knows and loves how much Riku is trusting him and he knows that the same is for the twin sister.
Nobody knows how much or far the oldest one is going for taking revenge if even one of her screams is from pain and not pleasure.
“Riku.” Tenn calls her while her sister continues to walk away fast. “Riku!” She takes her arm and turn her around.
Riku’s usually strong and cold glare is wavering to her tears and Tenn feels her thirst for blood starts to grown.
“Who.”
“No-“
“Who. Dared. To. Make. You. Cry?”
“Me and Touma had a fight.” She sniffs. “He continues to go on and on about I should take an another partner ‘cause he’s worried about the possibility that he’s away and I’m gonna to starve!” She huffs while stomping her foot down like a little kid. “He’s an idiot! My whole heart belongs to him and him alone!”
Tenn sighs while drying her tears away. “Riku, oh my silly little sister.” She says fondly. “Touma is just worried about you.”
“But I don’t love an another person… I can’t be like you…”
“You don’t have be me.” Tenn sighs again. “Me, Gaku and Ryuu have our own relationship, we love and take care of each other. I know that the two of them actually kiss and do more behind my back but I’m not mad cause we’re in a polyamorous relationship with all of three of us.”
“But would I… cheat on him?…”
“Riku,” Tenn rubs her face. “it’s cheating when the other part isn’t aware of your doing. Like we fuck, kill and feast on other demons and they, our partners, are aware of this and the same goes on take an another one, even if it isn’t an emotional one.” Tenn smirks a little. “And we both know that, between us, you’re actually the one who’s the most insatiable.” Riku blushes a little while her sister laughs. “So think about this one thing.”Riku nods while looking down. “So, before I let you go back to your knight, wanna play a little with our father.”
And they did, Touma sit down and talk with his wife and princess about what he meant for an another partner.
Since Touma is the captain of the royal knights, together with Gaku and Ryuu, he’d be usually away from her side for missions and battles so he’s just worried about the possibility that Riku wouldn’t be feed enough till he’d come back.
Riku is a little hesitant but she decided to put herself back into the games and that’s when she found him: Sougo.
Riku was walking, her naked body covered just by a sheet, towards her sister’s room, since they’re both alone ‘cause their husbands are currently on a mission, when she caught a sweet scent of apple pies and spices.
She followed it till she founds him, near the gardens: a knight that just entered into royal guard.
“Who are you?” She asks while looking at him.
“Huh!? The princess?!”
Riku sniffs the air again and smirks when she can feel a weak angelic scent under the mysterious man’s one.
“Oh~ so you’re a fallen angel?” She goes closer. “Ne ne~ tell me, was a good place like they say?”
The unknown one walks backwards ‘till he falls on the couch and Riku sits on his laps.
“Your scent… your blood scent is so good…” She says to the fallen angel. “Ne… is your blood gonna to hurt me?” She smirks while ripping open the shirt.
That man blushes while the demon girl is caressing his upper naked body before she licks his neck and bites it.
Riku pulls away almost immediately while looking at him before smiling widely.
“This doesn’t hurt me… You can’t hurt me…” She giggles while looking at him. “Ne~ what’s your name?”
“Sougo… your highness.”
“Sougo huh…” She looks at him. “Wanna be… my partner?”
“Huh?!” The man sits up.
“Careful.” Riku pouts like a little kid while looking at him. “Answer my question too.”
Sougo seems like he’s about to blushes when he recalls the naked body of the princess and where her intimacy is resting.
“Tell me, you wanna be my and Touma’s partner?”
"How could I-“ Riku takes his face in her hand.
“Touma told me that it’s okay, Tenn-nee too.” She looks at him a little grumpy. “Gaku and Ryuu told me that I need of your consent to have both a contract and marriage from you.” She tilts her head. “So, you wanna be our partner?”
Sougo looks at the princess’ eyes before gulping and nods. “Yes… your highness.”
Riku smiles happily before biting her tongue and kissing him, letting her blood flows into his mouth, sealing the contact.
Sougo widens his eyes in surprises before the princess moves a little away.
“You’ll need Touma’s blood if you wanna have a relationship and contract with him too.” She smiles while licks the fallen blood from his mouth. “Wanna take me in my room or here?” She giggles into see Sougo’s red cheeks. “Oh Satan, you’re pure.” She laughs while covering her mouth and she moves a little. “Bet you’re big too.” She licks her lips while looking lustful, letting the blanket falls a little down from her shoulders.
“Yesterday you were too damn noisy!” Gaku says and Riku laughs while picking up some flowers and Ryuu, together with Sougo, blushes.
“He knows how to fuck me.” She smiles and stand up. “And it isn’t like you aren’t too shy about fuck my sister and let both me and Touma hear it when we’re just trying to sleep.” Her response caused the poor Ryuu to cough and blushes more profoundly. “Sougo-chan.” She starts to braids the flowers into a crown before place it on her new partner’s head. “Perfect for my new partner.” She smiles pleasure with herself.
Sougo smiles, still a little shy, before taking his princess’ hand to kiss it chaste.
Touma still has to meet their new partner, due to his mission being prolonged, but Sougo already meet her sister and father and that’s a little enough for her.
Sougo, since their bond is still new and fresh, needs to have all of her attentions and cares, not to mention her blood and body, so she fears that Touma may be a little worried or jealous since, when Demons make a deal, the first days they're overprotective and jealous of everyone and everything apart from their contractor.
“Tenn.” Ryuu and Gaku calls her while she takes her whip.
“Don’t dare stop me.” She says while going out, not caring to cover up since just a snap of her fingers and she dresses up.
She barges into her sister’s room and whips out a few times, hurting maybe a few demons of lower rank, before going straight to Touma and Sougo.
“Who’s the responsible for this!?”
She was enjoying a moment alone with Gaku and Ryuu when she hears her bond with Riku hurt her, leaving her gasping and reaching out for her sweet half, when she ‘calm down’ she knows that Riku is hurt in someway. And she’s hurt badly.
“Two angels, they’re in the dungeons.” Touma replies firmly.
“They’re hurt too from our rage.” Sougo, Riku and Touma’s new partner, speaks out a little shy but firm.
Tenn still doesn’t trust him fully to love and protect her precious sister like she deserves, maybe it’s a little of prejudice due to him being a fallen angel and his blood being basically poison for them, but Riku seems a little more whipped towards him, considering even how quick Riku gets bored of her temporary partners.
Tenn clicks her tongue. “Give her your blood to help her to be stable.” She instructions them before walking fast towards the dungeons.
When she walks downstairs, she whips immediately the two angels and laughing to their screams of pain.
“God won’t save you.” She says while entering in the cell. “Gaku, Ryuu.” She smiles towards them before smirks. “Let’s have fun with them.”
The two nods while smirking too.
Even if they aren’t Riku’s partners, they’re just as much as protective and attached to their princess beyond the simple princess - royal knights duties and hurting her can make them lashes out as well.
Shouts and laughs comes from the down there before Tenn stomps down on the bloody wings.
“Useless things.” She grabs at them roughly and tugs and tugs till the feathers falls off.
The angels continues to scream and shakes while the demons founds it amusing.
They’re bruised and bloody from the whip, swords and daggers that got brutally thrown at them and stabs before their head got cut and torn off from their necks.
“Tenn-nee~” Riku smiles while Tenn is hugging her and drinking some of her blood.
They’re laying naked on Tenn’s bed and they’re getting some feed and bonding moment before it got interrupted from the door opening.
“You two truly are insatiable.” Gaku says while walking towards them.
Riku chuckles while Tenn separates from her.
“And I told you millions of time to not burst in without knocking first like this!” Tenn replies grumpy. She truly hates it when their feeding and bonding time is interrupted.
Riku sits up and kisses Touma while holding on Sougo closes, moaning in pleasure when he starts to bite softly on her skin and mouthing to her neck and chest.
Tenn sighs out in pleasure too and Riku looks over before smiling.
“Let’s play… Tenn-nee…” Riku whispers smiling while looking at and reaching out to her.
Tenn smiles too and reaches out as well to hold her hand. “Yes, let’s play Riku.” She smiles and whispers back.