Son Da Eun, 17, is the youngest of three sisters. From an early age, she and her sisters would spend their time reading romance-themed comics and novels, and Son Da Eun would spend her nights dreaming of finding true love. Her family moves to the South Korean capital, Seoul, and she finds herself living next door to a handsome high schooler named Kim Seung Hyu. He is charming and attractive, and she feels that perhaps he might be her first true love.

Mimi started to gamble, dreaming of turning her life around. One night, she loses her family in front of her eyes in an unknown attack from an unidentified assailant.