The characters are humanoid demons who occasionally interact among themselves and with the lesser humans. There is also goblin and liquid tentacle stuff (and even futa at some point!). What you repeatedly see here is characters turning from the dominant to the submissive side, and vice versa.
Each character's art is unique and well-designed. The setting is also a strong point; if you like hentai set in a dark-themed world (which coexists with the human world), this is for you.
I haven't experienced any problems with sound and my enjoyment of the anime was good. My overall rating is 7.
