Well i'm to lazy to type up the story so I copied and pasted it:
Subu makes pornographic films. He sees nothing wrong with it. They are an aid to a repressed society, and he uses the money to support his landlady, Haru, and her family. From time to time, Haru shares her bed with Subu, though she believes her dead husband, reincarnated as a carp, disapproves.
And thats what its about with more to it.