The content of the film is quite rough between the plumber and his lewd wife.
Saying "lewd wife" is only half true, she was raped at first, she resisted, but she didn't tell her husband but kept it a "secret", maybe because the other guy was too happy.
As for the other worker, he got used to it once and he continued to "eat" the next time, every time his husband went to work.
There is a scene at the end of the film that the viewer is very annoyed or more stimulating, the husband has just left work, the wife and the other lover have locked the door and made each other happy. Because I forgot the documents that the host returned and what will happen?, please watch the movie together.