I explained that it was a job as a masturbation assistant for Yui Hatano, a famous actress, and secretly filmed another project. Yui-chan couldn't take it anymore and started masturbating without knowing she was being secretly filmed. Later, I was frustrated by frustration during filming, and filmed how I passionately masturbated during breaks and in the bathroom. This work is a documentary that repeats masturbation to turn it into a state of breaking technique and going crazy with unusually pleasurable masturbation.