the ninth

can't believe i peaked here

art: https://danbooru.donmai.us/posts/4773325

Mark yawned as he entered his bedroom, locking the door behind him. The familiar routine he carried out every night felt almost like comfort: closing the blinds, booting up his PC, taking off his pants as he sat down at his desk. What would he watch tonight? Mark scrolled through the usual sites, nothing jumping out among the thumbnails of naked, screaming, moaning anime girls… he supposed it was a good thing he could find something to watch at random. “Hm…” Mark clicked the button a few times, before something finally caught his interest.

“Turned Into My Crush’s Younger Sister!” was the title, a pretty generic image of a naked anime girl on the cover. Mark quickly looked over the tags - good thing there was nothing too outrageous. “Transformation”, though… Mark had to admit that was new to him. He clicked the button to start playing, and was greeted by what seemed to be a typical plot set-up, some guy talking with a hot girl in a classroom - he didn’t care. Mark skipped through all the boring setup and was finally rewarded by the stuff he had been waiting for: the same boy from before, gagged and tied to a chair as the girl approached him slowly. Mark smiled, slowly running a hand over his member to stimulate it a little, and as the girl began to do something to the boy, fulfilling the "Transformation" part of the tags, he got to work.

Mark watched the girl slip behind the boy's chair, taking his hands in hers as she squeezed them tightly. Soft cracks sounded, the boy involuntarily letting out a soft moan, and as the girl withdrew her hands Mark could see that the guy's hand had shrunk, a thin layer of polish coating their nails. Of course, with his attention focused almost entirely on his computer monitor, Mark failed to notice that the hands that were rubbing up and down his swiftly stiffening member had underwent the exact same changes. "W-what are you doing to me?" The boy on screen cried out, his face flushing red as the girl pushed on his shoulders to shrink them down - sure, the voice acting wasn't the best, but Mark had to admit that the premise was pretty hot. It was somehow easy to imagine himself in the role of the protagonist, to feel the crunch of his shoulders as they shrank, the sensation of burning around his midriff as she moulded the boy's flesh like it was putty, shaping his waist to be narrower and his hips wider. “You said you wanted to be with me, right?” The girl’s smirk was wide, teasing as she ran a hand through the helpless boy’s hair, styling its spiky arrangement into a neat chin-length cut. "Well, I'm just granting your wish - though maybe in a slightly different way from what you were expecting…" Mark brushed aside a bit of his hair with one hand, the other continuing to pump away vigorously; the fact that his hair had now turned black to mirror that of the boy on screen did not cross his mind.

Mark’s arms starting to grow more tired as the girl rubbed at the boy’s arms, causing them to become slimmer and the muscle within to be replaced by fat. “S-stop…” Even the boy’s protests were starting to die down, a look of arousal appearing on his face as his body was reshaped. And as she caressed his face lightly, changing the boy’s male visage into that of a female’s, Mark felt as if invisible fingers were dancing over his face too, his face gaining a distinctly more Asian appearance. And he was starting to blush too, feeling the phantom sensation of hands massaging his chest as he watched the girl form two round, perky breasts from the boy’s chest, Mark and him moaning simultaneously as she pinched and squeezed the sensitive nipples lightly. “Enjoying that, are you? Well, make sure you’re prepared for this part…” She gripped the boy’s erect penis tightly and Mark tightened his hold on his, going faster and harder to enter the final stretch. His grip seemed to be slipping, though, maybe it was the pre-cum leaking from his shaft, or maybe it was his erection slowly shrinking, penis retracting into his body as Mark watched the boy’s do exactly the same. As it finally vanished and the girl drove her finger into the former boy’s newly formed vagina, Mark’s fingers entered hers as well, pumping motion changing to thrusting in and out as she explored her female anatomy for the first time. Mark came at the same time as the girl on-screen, bucking and thrashing wildly in throes of orgasm, and as her head lolled backwards, mind going blank, Mark found it hard to think about anything at all. Much less who she was…

The girl’s voice came from her headphones, speaking to her submissive subject but also to Mark “When I snap my fingers, you will remember nothing about your old family, your old memories, your old identity. Your name is Yuki, and you are my younger sister by two years. You will only remember having grown up in our family, looking up to me as your role model…” Her voice filled Mark’s ears, implanting new information and a new personality in her mind, and she didn’t notice the room around her change: movie and game posters on the walls replaced by those of shōjo manga and anime, wallpaper becoming pink from the drab grey it was before, decor much more feminine and cutesy - it might be considered a little immature for an eighteen year old girl like her, but Mark didn’t care. Nor did she notice the clothes around her body warp and reform, a pink camisole and striped sweater appearing around her upper body and white shorts hugging her rear tightly.

Snap. The door behind Yuki burst open and she jumped, turning around with a furious blush on her face. “Sisss!!! Didn’t I always tell you to knock before entering?” Hana smiled, eyes lingering on the monitor of her computer and the very adult things displayed on it, and raised her eyebrows, just a little. "What’re you watching?” “Something ridiculous about a girl turning a guy into her own sister… it was strange.” A smile played over Hana’s face for just a second, her eyes sparkling with delight. “You don’t say.”