Pure, adapted from Rose Cartwright's acclaimed memoir, shows a young woman's real experience of an extremely obsessive-compulsive disorder nicknamed "Pure O". This 6x45 minute dramedy tells the story of 24-year-old Marine, who is always plagued by invasive and often painful sexual fantasies. At first, she thought she was a sex addict and left her Scottish town for London, but soon discovered that she was suffering from some kind of obsessive-compulsive disorder. In London, Marnie made a new group of friends, each with his or her own challenges. She moved in with her "seemingly happy" old alumnus Shereen and became friends with Charlie, a porn addict. Marnie also met Amber, who is notorious for promiscuity, and her charming roommate Joe. [what is "Pure O"? A form of obsessive-compulsive disorder in which people experience obsessive-compulsive disorder but do not necessarily have external manifestations. This situation is characterized by frustrating, intrusive thoughts or mental images. These ideas or pictures often revolve around the theme, including: to the self and.