In July 2012, at the 38th class reunion of Gwangan High School in Busan, Cheng Shiyuan (played by Jung Eun-ji), who has been a TV writer for 10 years and is now 33 years old, recalled her high school days full of youth and restlessness with her former friends. Surrounding Shiyuan's family and her friends, the curtain of memory is gradually opened in the interlaced narratives. Back in 1997, Shiyuan was 18 years old, fanatically loved HOT, had a pair of parents who quarreled and loved each other, and was silently protected by her childhood sweetheart Yun Yunzai (played by Seo In-guk) without knowing it. The two were surrounded by friends with different personalities such as Jiang Junxi (played by Lee Ho-won), Dao Hecan (played by Yin Zhiyuan), Mao Youzhen, and Fang Shengcai, and their mentor was Yunzai's excellent brother Taiyong (played by Song Zonghao). At that age when one could gamble their lives for a little thing, the six friends experienced the growth and transformation of friendship, family affection and love together, and gradually chose different life tracks. 15 years later, they meet again at the class reunion table, and their respective life directions and emotional destinations will be slowly revealed... The drama is set in Korea in the 1990s when HOT and Crystal Boys were active, and vividly reproduces Korean fan culture and high school life. The extensive use of Busan dialect in the drama is also a major feature. The drama set a record high ratings after it was broadcast on TVN cable TV in Korea.