Uta no Okaa-san to Issho

The main character, Shuuichi, is a new the new assistant director for the NEK TV. One day, he learns that his mother, Miho, was once a “songstress” who dominated in the past. It was Michiko, a former female TV announcer and a talented producer, who told him about her.

One day, Michiko orders Miho to once again become a songstress. Miho is reluctant to do so, but when her own son is forced to bring up the possibility of getting fired, she decides to take the job. The costume Michiko prepared for Miho was so extreme that even her nipples were visible through the costume!

Miho is forced to serve the mascots and play with them in front of the TV camera in a public erotic humiliation play. Miho tries her best for her son, but the play in the show turns more and more extreme!

[From official site]