Nothing graphic is shown although sex is implied throughout the series. The intro song has a brief scene showing a woman's bottom.

Episode 6-7 No nudity whatsoever.

Episode 8-9: A short scene showing a woman in a sensual position, though nothing is shown, it is implied that she wants to have a sexual relationship or is awaiting sex. Nothing graphic.

Episode 10-12: No nudity

Two uses of "whore" and one use of "bitch" in the official subtitles.

A few "idiots" here and there and the antagonist basically wants to "kill" others. Nothing strong to the ear.

Nothing out of the ordinary.

One character is shown smoking something but it is basically a "smoke weapon" to hurt the protagonist rather than for enjoyment.

Some characters may ask for a sake or two. (Japanese alcoholic drink)

The premise is really creepy.