Though those are definitely bedroom eyes they're casting towards one another. I do believe one of Beast's designers (somewhat jokingly) once said Belle had seen Beast naked.
That just reminds me of the movie commentary where either Glen Trousdale or Kirk Wise joked that Beast was one step away from just not wearing pants before Belle came along XD
Gonna do a few tags before bed. LOVE the Studio Ghibli-esque look of this fanart and how someone pointed out Beast's eyes look more like the wolves than Belle's in this one.
But yes I have definitely found steamy Belle/Beast art before that's basically foreplay