*A Diary of a Kpop Idol* is about Yeim, a young lady from one of the wealthiest families on earth. Her father owns an international chain of hotels, and her mother is a major shareholder in LVMH as well as a world-renowned fashion designer. Yeim also has an adopted brother, Ian, who is a successful entrepreneur. Their family history boasts royal blood from both the Yuan Dynasty in China and the Goryeo Dynasty in Korea, and they own numerous real estates globally. The protagonist, Yeim, trained for six years before making her debut in the music industry. Her rise to fame was swift, and within just a few months, she became a household name. She was part of a highly successful K-pop group with six other members: Yuji, Somi, Hani, Lily, Chae, and Haeven. The group dominated the music scene for two years before stepping down to focus on their studies. Despite this, they continue to engage with fans through live streams and vlogs.