This is your standard "boy meets girl" story featuring a relationship between an ushichi (a type of slave cow-girl) and a tsundere university student. Being such a well worn trope I'm sure most readers who are familiar with it will know exactly how this plays out. There isn't really much of the way of plot here, with each chapter generally being a "slice of life" of perversion and there is lots and lots of sex and breasts and milk/lactation scenes which is a given since the girls are all humanoid cow girls.
The art is pretty good, clearly professional mangaka quality and the character
designs are attractive. Sometimes the jokes are a little bad, but there are a few chuckles to be seen here and there so this does work as a comedy and not just an h-manga.
That being said, I'm pretty sure the only real reason to read this is if you enjoy big breasted pet girls or have a cow-girl/lactation fetish, because that absolutely makes up 80% of the content here. Not that this is a bad thing, but it's pretty much all your getting.