My rating: 3/10
It's plain porn from the start to the end. The characters are dumb and one-dimensional, the uke gets harassed all the time and has literal breasts, he even starts wearing a bra. Overall no plot to speak of.
SMUT, SEX TOY
An employee of a sex toy company (uke) gets assigned the position of a tester and has to try out their new products. As he's a virgin without any knowledge, he asks a popular porn star for help (seme).
Sex Toys: How to Educate Newcomers with Big Breasts