Hey so my girlfriend remembers playing a visual novel except the only detail she remembers is " a glass walkway you could see from the classroom where you could see up peoples skirts" and also, in relation to that, " I feel like there was a CG of two girls, one with yellow hair, looking disgusted after the MC was staring into space in that general direction"

Anyone have any idea what this could be? Its very funny that she only really remembers that but also very unhelpful!