Stela of the sleepless city

19-year-old Sei dreams of a stable life as a government official. But when her mother suddenly passes away, she discovers a bankbook with 1.5 billion yen—money secretly sent every year by her father, who disappeared 15 years ago. Sei soon learns he owns Tengoku District, a lively nightlife hub. Then, a scout named approaches her, asking, "Want to be the Queen of the Night?" (Source: Natalie, translated)