A warm, friendly, considerate person, Hee Jae is surrounded by people who claim to know and love her. The problem for Hee Jae is that she isn’t really sure if she really understands herself. On the other hand, Mi Na is Hee Jae's confident and energetic best friend and colleague at Play Books, a supplier of books and related products centered around sex and romance. While an expert in how to achieve physical pleasure, her understanding falls short on romantic relationships. When they find themselves told to take over hosting a sex and romance advice podcast, the two feel more than a little lost...

• Hani
• Bae Woo-hee
• Park Sun-ho
• Choi Gwang-rok
• Hong Seok-cheon
• Lee Hye-ji
• Choi Woong
• Kim Pub-lae