Rhythm: Koi no Ritsudou / Pure love

Adaptation of the hentai visual novel of the same name by studio Libido. 

The main character of the story, an ordinary unremarkable guy named Hiro, who loves dangerous adventures, unsolvable puzzles, and women. Rumors spread around the city about a mysterious artifact that has a powerful force. Hiro decides to find it and asks his childhood friend Puri for help. Together they study an old book with a bunch of mysterious texts in an unknown language and realize that the trail of the artifact leads to a cave located not far from the college...

A young and sexy girl Fauna is in a rather unusual state - for several years now she has been irresistibly drawn to sex with various partners during sleep. She cannot control herself in this state and her friends are very worried about it. According to legend, there is a mysterious flower that can cure any disease and if it is true then Fauna's problem can be solved...