>>2326480No but that's the first guess whenever I ask someone. It looks something like that but the legs really spread wider and lower to the bed, the model was like IA Rocks from my post if I remember correctly. The view was from farther away and more to the side. I will try to find something that looks like it.
I haven't seen it since and I couldn't find it on Pixiv, Danbooru, Sankaku, Google etc. which made me think it was specific to a 4chan user and not many people saved it.
It's hard to find this exact pose. It's like this maybe except the legs are both evenly spread and wider. But the view of the butt was something like this.