Regular mild sexual references, mainly in a scientific context. The protagonist's "interviews" sometimes involve non-graphic sexual discussions, such as how vampires sucking blood is linked to sex and how succubus can cause sexual desire to the people around them.

Occasional mild fanservice, such as the outlines of breasts during bathing scenes and breasts jiggling through clothing.

Infrequent mild comic violence. No blood or injury detail.

Infrequent references to graphic violence in the context of urban legends or horror stories.

Infrequent mild coarse language ('damn', 'hell', 'crap', 'suck') in the English dub and official subtitles.

Some occasional social adult drinking, including brief implied intoxication.

Adult men are briefly seen smoking, though it is not condoned as a teenage girl criticizes the smell of it.