hello goodday JaniCitaa.
What exactly is the animation that hides the buttocks? chuckle🤭
Have you already tried KUSO's Animation Override (AO)?
[AX-001 D1468-Stand N]
If you are looking for an AO like mine in this image, it is worth visiting the following places
Kuso - Oracul Animation, Kuso (128, 134, 23)
http://maps.secondlife.com/secondlife/Kuso/128/134/23
Please touch the sign after teleporting to the site.
The AO in the image is [AX-046 D6032-Stand N (Bento)] 20L$.
KUSO's AO is buying as a Fatpack and as a Single item product.
There is also an AO made by the creators of KUSO that exists as a free gift in the in-world and marketplace, called [AX-001]. Many wonderful animations are included in AX-001, But it is not Bento compatible.
Why not try that first?