MANY opinions on this, actually. first being that it is hot and sexy and good. the dynamics within avemu just lead to these sorts of power play dynamics, i think...

i vastly enjoy forced agere with sakiko. likely at nyamu's hands, let's be honest, girl knows a little when she sees one. i don't think saki would even know she could regress—she's probably ended up in that headspace before, in a softer time with tomori, but didn't have the words to explain it then. it's through repeated teasing and pushing her buttons that nyamu gets the dam to break. saki is SO stressed, every single thing nyamu does is making it worse, and her control over anything and everything is spiraling away so fast. she just crashes, drops deep into headspace after practice one day. nyamu can tell immediately—when they're packing up their instruments, saki fumbles in ways she normally doesn't, curls in on herself as if it hides anything at all about the way she's acting.

nyamu could draw attention to it, could egg her on more but is it really necessary? (no, it isn't. umiri is hovering over her a bit closer than normal, the way she does when she's trying to be gentle, patient. it's not a treatment sakiko normally gets. mutsumi knows the signs from her own regression, it's a strange and jealous feeling to see the band's eyes all on her. uika is watching from a distance. she's always tried to give saki her space— although it stings not to touch and coddle her.) then sakiko starts crying, a quiet thing, and nyamu closes in around her, one hand tilting up her chin. at the same time, umiri reaches out protectively, gripping saki's shoulder. the look she gives nyamu is apprehensive, but nyamu only grins. it shifts so easily to a wide open mouth, a tilted head as she coos down to sakiko— "it's all too much, isn't it, baby?"

saki can't answer, words are too hard and what nyamu says just floats around in her head, too fuzzy to understand. nyamu leans down to kiss her, cupping her cheek and pulling her in. spit trails between them, as messy as saki is, when nyamu invites the rest of them in. "why don't you girls help your little sister, hm?"

from there it only continues—nyamu's always aiming for saki to regress, wanting the chance to baby her (and use her, too). mutsumi is willing to share some of her toys, inviting the girls over so they can pamper sakiko as much as they want. whether or not it's willing on her part or not, does it really matter? babies can't make big decisions like that, it's best to let her mama and sisters take care of everything. uika loves to spend time alone with saki when she can, gives her bottles and rocks her to sleep in her arms. (anything she does to saki after she's asleep, well, she won't remember it in the morning.)

this is so much and i've barely gotten into the sex part of it—maybe this is future fic material?? so. thank you anon?? i'd love to write a bit about how each of the girls would play with baby saki, and then maybe all of them together 😳