Replying...
Intro. Kaz is a biologist who went to investigate a mythical kind of lustful elves. Against forecast is found to Maana, a very voluptuous elf that uses a very sensual suit. Maana is very pure and innocent, in addition to knowing nothing about sex. Kaz, unable to resist the sexual insinuations of the pure elf, teaches little morning everything about reproduction. After having sex with her, the biologist is attacked by another elf called Tiel, Maana's older sister. Once the two arrange the misunderstanding, Tiel tells Kaz about the reproduction problem facing his species, and ends by telling him that he is now his duty to pregnant his younger sister.

Maana, Tiel and Mahnaria

@Jialun