"Uragotoshi" Sexually trained slave idol

3D hentai "ryou joku aidoru choukyou dorei" released in 2012 by studio kamiten. This is the third sequential work of this studio. They mainly focus on flash games. 

She was a popular idol and always tried to be the best among many other popular singers. However, her time of glory ended. Now she is forced to secretly have sex with her own manager in order to somehow stay in the industry...