Hey, look, everyone: it’s a reverse mullet! Party in front, business in back!
That’s assuming you can call a baggy shirt and frumpy fake-skirt a “party”, obviously.
And also assuming that you can call skinny jeans and the same baggy shirt “business”.
In other words, unless this garment is aimed at people who want to look like they’re wearing a skirt over their jeans, without actually having to wear a skirt over their jeans, we have no idea why it exists. And actually, we have no idea why anyone would want to look like they were wearing a skirt over their jeans in the first place, so we have to conclude that this is a crime of fashion.