This is a softcore sex film: well over half its running time depicts implicit heterosexual vaginal intercourse, fellatio, and cunnilingus.
Explicit penetration is never shown. Genitalia are generally kept concealed with posing, blocking hands, and such, but there are several glimpses of both female and male genitalia.
Each of the movie's five sex scenes depicts two of the five cast members having sex together. Each cast member participates in at least one of these scenes, some in two or three of them. Therefore, we see each cast member fully nude.