Onimai My sister needs diapers

[Little Rei]

Mihari nodded “Thank you maam.” and as she took her sisters hand to the back room and shut the door behind her “Okay sis let’s get you out of those wet things.” Unbuttoning her uniform and started to peel it off until she was down to her training bra and wet panties “Now go lay down on that mat for me.”

[UltraChild]

Mahiro blushed and squirmed as she was stripped down to her bra and panties. "Mihari i...I literally just told the nurse I'm not a baby I can undress myself" she whined and stomped her foot like an actual little girl and not the oldest sibling that she actually was.

But none the less Mahiro did what she was told and pouted. "I'm I in trouble it won't happen again I promise"

[Little Rei]

“Hold still Mahiro I need to undress you so I can get cleaned up properly.” She reminded her “Will talk about that later .” Referring to her stomping her foot before she slid the panties off and put them in a plastic bag “Now hold still this might be alittle cold.” Grabbing some baby wipes that she bought and started to wipe her private areas

[UltraChild]

No matter what Mahiro did it was useless as she was cleaned up. Mihari don't touch me there..it's gross and cold" she stopped fighting as rhe girl was tired today's event's getting to her. "Can we just go home please? I don't want to be here anymore"

But Mahiro's eyes widen in horror as she saw two items Mihari pulled out next which was Baby powder and a diaper big enough to fit her. 'No Mihari please anything but that I'll do anything" she started to cry.

[Little Rei]

Mihari finished cleaning her up before pulling out the powder, diaperr, and aquafor cream “We will in a second just gotta take care of one thing.” She told her before noticed the girls whimpering and a finger on the girls mouth “Shhh I know but you can’t keep ruining your panties this is for your own good.” She told her getting her on her stomach and started to apply the cream on her bottom

[UltraChild]

Mahiro only nodded as she didn't want to get Momiji and the nurses attention not unless she wanted to be caught being put in a diaper like a baby. (I want to wake up from this nightmare) she let out a sigh as Mihari rubbed her stomach which made her feel relax (this feels nice) she shook her head.

"What I'm I thinking?" She muttered and spoke up. "Mihari umm...what happens now I mean don't you think this is weird?" She shivered as the cream was applied. "I'm.. yo..you're big brother despite being changed into a little girl you know"

[Little Rei]

Mihari continued to rub the cream on the girls bottom before turning her over and started to apply it on the girls soon to be diaper area “No I don’t I’ve seen you naked when used to bathe with me when you were still a boy.” She reminded her as she finished with the lotion then got the baby powder out and started to coat the small teen in it.

[UltraChild]

"Eh.. what are you doing?" She asked confused then let out a sneeze smelling the baby powder. "Oh" She understood now, "still your acting like this is normal either that or you've decided to seriously take on the big sister role that everyone thinks you are" she let out another sneeze.

"They are totally going to know you put a diaper on me just by the baby powder alone Mihari" Mahiro looked at the pink diaper by her sister. "And that diaper is quite thick I'm obviously going to have some difficulty walking alone plus I'll be waddling "

[Little Rei]

“you need this sis you don’t get a rash .”she assured her tempted to get one of her new pacifiers to shush her complaining but decided to opt out on it then grabbed the thick crinkly garment and unfolded it then lifted her sisters ankles and slid it under and added abit more powder “Your uniform should hide it and if your worried about waddling you can either take my head or I can give you a piggy back ride.” She told her bringing the front up then taped it up

[UltraChild]

"I don't need this is at all I just needed a fresh pair of panties this is you're idea not mine she let out a sigh. (This conversation isn't going anywhere..whatever I'll just take it off when we get home) apparently was unaware of a hidden camera that Mihari installed. She got off the bed and felt a bit uncomfortable at the sound of the crinkling.

"I'll take a piggy back ride that why Momiji won't get suspicious or try anything just in case" she started to try and walk to get her spare uniform but fell on her padded bottom. "This is going to be a nightmare isn't it?"