“hey junko, check this out!” mukuro pushes her way into her younger sister’s room, beaming. the smile on her face lights up the room as soon as she enters it, highlighting the delicate spread of freckles across her skin. with her, she carries a green, beat-up, fabric bag; excited to share its contents with her little sister.
“whatever it is, it’s stupid. don’t waste my time.” junko replies without looking up from her phone. she’s texting furiously, already in the middle of roasting her big sister with celeste.
mukuro blushes, the flustered smile drawing junko to gaze at her from the corner of her eye. “oh, stop it you…” mukuro waves her hand. “come on, i think you’ll like it.”
junko sighs heavily, setting her phone down on the table, sauntering over to mukuro with folded arms. “let’s just get this over with. show me what you’ve got.”
excitedly, mukuro pulks a shiny new knife out of her fabric bag.
“it’s designed to slice into flesh a lot easier. kinda like this.” mukuro starts stabbing the air, pushing the knife in and out in a rythmic fashion. her muscles tighten, and junko can hear her sister’s soft grunts and hard breathing as she emulates stabbing someone.
junko is absolutely transfixed. the motion of mukuro thrusting the knife into something, accompanied those little sounds… it absolutely destroys her. she can’t do or think of anything else. all she wants is to feel mukuro thrusting into her and feel her sister’s body pressed up against her. junko starts to sweat, her eyes fixed on her big sister’s toned hands.
“that’s sooooo interesting…” junko says, wrapping her arms around mukuro’s neck. “why don’t we see…” she guides mukuro’s knife in-between her own thighs; putting it in an undeniably phallic position, “…how nice it feels to thrust it here?” the blonde bites her lip, hoping mukuro will take the bait.
“oh, uh. sure!” mukuro smiles. she is completely clueless.
standing intimately close to her sister, junko slides her thighs against the blade of the knife; swiveling her hips with each and every stroke. slowly, mukuro begins to make stabbing motions, pushing the knife in and out of the blonde’s soft and pillowy thighs. junko moans softly into mukuro’s ear with each thrust; both of them visibly becoming hot and sweaty the longer they do it.
this goes on for an inordinate amount of time. it doesn’t matter how many times junko’s phone goes off, all she sees is mukuro; fantasizing about getting railed by her big sister’s fancy new knife. the idea drives her crazy, until she can’t stand it anymore.
“let’s take this to the bedroom muku-nee~”
“huh? why? do you need to lie down?”
“…what.”
“junko, you’re burning up! maybe you really should rest…” mukuro appears concerned, pulling the knife out from in-between her little sister’s thighs and putting it away.
junko sucks in air as soon as the knife leaves her skin. being edged and then rejected like that… it was truly the meaning of despair. it was hard to be angry when the very though made her even more wet than she already was.
“sis. sis i’m going to fucking murder you, idiotic pile of shit, you don’t deserve to be the dirt under my heel let alone–”
mukuro was going to get quite the talking to for ‘teasing’ her like that. by the end of the night, mukuro still isn’t even really sure what had happened.