This is actually how it's supposed to work. The gluteus maximus (aka the butt) is connected to the sacrum and ilium, so that when the leg bends it streches it, giving her butt that flattened appearance.
there is this thing called fat, which ass is full off; which will prevent the ass from being fully flat in that position (unless one has skeletor ass ofc)
There is also a second explanation that's plausible in this situation. The soft body could be sticking to the vertex of the body causing it to look that way. Weird Blender stuff, but I doubt it's that since Idemi has been doing animation for so long they'd know how to fix it.
As an avid Ada enjoyer there's not a ton. Or at least in my taste. Howlsfm, HydraFXX, Shirami, and TheCount have some pretty high quality ones. Wutboi and ZMSFM have some respectable ones.
I think his mega archive got banned at some point, but he never uploaded 1080p version again, 4k is there tho
You don't like the BulgingSenpai Ada animations? I was going to say Nagoo as well but iirc you don't like his stuff?
