Su Yuyou is a full-time online novelist who comes from a wealthy family but deliberately dresses modestly to blend in with her writers' group. She has amnesia and does not remember a significant past event involving Han Yuchen. She is naive and innocent, easily trusting others, and unfamiliar with bar culture. At Candy Bar, she accidentally drinks an alcoholic beverage laced with drugs, leading to her being harassed by two drunk men. She is rescued by Han Yuchen, with whom she shares a complicated history including a passionate kiss five years prior. She has recurring dreams about kissing him and later bites him when drunk. She is protective of her secret about drinking and threatens not to be told on her. She lives in an apartment that experiences a fake power outage arranged by her brother.
