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Disclaimer: This is a work of AB/DL fiction. If that isn't your thing or you don't know what that even means well move along weary traveler of the internet.
Content warning for this story: Diapers, age play, diaper punishment
Locks of light purple hair shifted about, poking from under the warm enclosure of thick blankets as the teenage girl stirred. Little grunts and groans accompanied her movement as Tsukasa Hiiragi awoke from a nap. She rose to sit up, pushing back the folds of covers and taking in the world through eyes still half asleep. The light trying to make its way into her room through the curtains was well past its morning life and creeping steadily onward into afternoon. With a long yawn she tilted her head to the clock on her nightstand reading ‘1:55’. While it wasn’t uncommon for her to nap during the day this time it was due to the demands of hard academic effort.
Last week Tsukasa had brought yet another unfavorable report card home and she knew all too well what that would mean for her. She was by no means a bad child but often not attentive to her school studies, favoring playing and watching TV until it was too late, a habit her mother Miki did not allow to go unpunished. After a stern lecture on the importance of her grades and a quick twenty swat spanking to her bare behind it was back to sized up baby diapers once again for the bubbly girl. Getting spanked and diapered by her mother at her age never did stop being embarrassing as can be, especially when her mother had no issue doing so in front of her three older sisters. To be fair, Tsukasa could at least feel slightly less embarrassed since she knew Kagami and Matsuri had been punished in similar ways. Kagami and her even had been diaper punished side by side before, though she never knew if her oldest sister Inori ever got the same treatment or not.
Though not any less humiliating than other times Tsukasa at least by now knew to knuckle down and try hard at her studies after a lapse in her grades. With a sore and crinkling seat she got right to work making up back due assignments and studying as hard as she could that week, asking for help when she needed to. By that Saturday in the late morning her hard work had paid off. The list of work she needed to do had been gotten through and a practice test her twin sister Kagami gave her for the one coming in class the coming week proved favorable.
Her mother smiled and praised her for trying so hard she remembered coming out of a drowsy fog. “Good job, Tsukasa. I knew you could do it if you tried your best.” Miki Hiiragi held a hand up to catch her before she began to speak. “But the rules are rules. You’re staying in diapers until the morning you go back to school on Monday. No fuss, no discussion. But how about a diaper change and a nap? I’m making something for dinner tonight I know you’ll love.”
Tsukasa blushed deep then at the offer knowing she had been holding back filling the back of the pink padding around her waist through the day in hopes of getting off early for good behavior. She meekly nodded offering her hand to her mother, doing her best to ignore the muffled giggles of her college age sister Matsuri, being led off earlier that afternoon.
She was awake now, dressed in a frilled purple shirt, pink frilled socks, her usual yellow hair bow, and of course a fresh crinkling diaper decorated with floral and heart prints that she found faded when wet. Tsukasa stood up stretching in an effort to come fully awake. She left her room exposed from the waist down. She was still on her punishment and rules were rules after all, no covering up while at home if no company was over.
Wandering the house she found no one of her large family around at all. Kagami had gone out with Konata, Matsuri had her own studying at the college to do, and her father was at the shrine. Inori was busy with some job she had picked up, though she never really did talk about it other than saying in passing she liked the work. Lastly her mother had left a note in the kitchen saying she went out shopping and would be back.
It was a rare thing that she ever was home by herself though as she moved about with a subtle waddle from the thickness of her diaper Tsukasa couldn’t help but blush and feel a bit like a little girl again. The thought brought on an idea. A bashful smile no one else could see grew slowly on her face and as the purple haired teen sprung gleefully to work. She brewed a quick pot of tea, having a craving for some after her nap. While the tea warmed she rushed back to her room digging out a pink tea pot with a heart print on it she had used so many times before and filled it with the steamy brew. Taking up a few cups she went back along giggling to herself as she went along.
A few textbooks still lay out on her desk which she took up and placed on the floor in a small stack. She grabbed her favorite stuffed toy from the bed, an odd green frog looking creature wearing a golden helmet and star pattern on its white chest, and leaned to sit upright against the book stack.
“Good day to you, Sergeant. So nice for you to stop by.” Tsukasa beamed, sitting on her legs on the floor opposite of the toy. “What’s that?” She gave the plush her full attention, nodding like a good listener. “I agree. It has been much too long since we’ve been able to just have a bit of tea like this.” Tsukasa placed a cup in front of the Sgt. Frog toy and one before herself pouring the hot tea for the cup before it.
“Oh? What have I been doing?” She smiled brightly at the pretend question. “Well, as you can see, I’ve been working very hard studying. What’s that?” Tsukasa waited for her make believe guest to finish talking. “The diaper? Umm, well, that’s a lady’s business now isn’t it?” Tsukasa winked, a smile filling her face. “Hmm?” The teen girl waited, pouring her own cup of tea now. “I look cute?!” Her cheeks brightened with a small red glow. “Sergeant! How very flattering of you. You are just a little charmer aren’t you?” She waved her free hand giggling.
“You know, Sergeant, it's been far too long since we’ve visited like this.” Tsukasa sighed. “Being a big girl means no more tea parties with you and that’s just no good at all.”
“Aww but I always loved being invited to your tea parties, Tsukasa.”
Tsukasa jolted in surprise and turned to her door that she had absent mindedly left open. There in the doorway stood her oldest sister Inori. Short plum colored hair framed her face. She wore a bright and warm expression as her deep blue eyes looked down at her younger sister. Inori was dressed much more like the mature girl far along in college that she was wearing blue jeans, a red blouse, and light yellow cardigan.
“S-sis! I didn’t think anyone else was gonna be home!” Tsukasa stammered out, her eyes darting all over the room.
“Oh, so that’s why I didn’t get an invitation.” Inori put a finger to her chin. “That makes sense.” She closed the door then walked into the room and sat down on the floor in an empty space outside of the little circle made by her younger sister, the cups and the stuffed toy. “I hope it’s ok that I showed up uninvited then.”
Tsukasa blushed deeply wanting to cook up a reason for what she had been doing but nothing came to her.
“May I join you and the handsome Sergeant then?” Inori smiled. “It really has been much too long.”
The sisters shared a look in silence. Inori’s warm smile melted away the doubt nearly instantly from the diapered girl’s heart as a shy smile grew on her face.
Tsukasa poured a third cup of tea, being an attentive host for the stuffed plush. “Sergeant, you remember my Onee-chan right?”