Appearing as a serial in the monthly shōjo (targeted towards girls) manga magazine Nakayoshi from the April 2001 issue to the January 2003 issue, the chapters were compiled into four bound volumes by Kodansha and published from November 2001 to March 2003.

Set in present-day Japan, the series focuses on Lili Hoshizawa, a teenage detective who uses astrology to solve cases.

Set in modern-day Japan, the series centers on 13-year-old extrovert Lili Hoshizawa (星沢リリ, Hoshizawa Riri), who uses astrology to solve crimes,[1] and manages her missing mother's fortune-telling business on the side.

Periodically, she encounters rival private investigator Sirius (シリウス, Shiriusu), who tests her mystery-solving skills.

While solving cases, Lili eventually learns from Hiromi's elder sister, Megumi Oikawa (及川めぐみ, Oikawa Megumi), that Hiromi's allergy to girls resulted from her: ten years ago, he waited in the rain for Lili to show after he left her a love letter.

Lili encounters Zeus (ゼウス, Zeusu), a fortuneteller and hypnotist who kidnaps her father.

Lili learns that her mother disappeared to protect her family from Zeus, who hates Sirius, as he believes that she kidnapped his girlfriend and caused her to become comatose.

Manga artist Natsumi Ando enjoyed astrology in her childhood and had a fondness for stars and Greek mythology.

[1] In his review of the second volume, Anime News Network's Allen Divers described the series as similar to Detective Conan and wrote that despite the predictable endings, the series was potentially enjoyable for readers interested in astrology and mysteries.

[27] According to Jason Thompson, author of Manga: The Complete Guide, the series worked as light and "formulaic" entertainment for a young audience, and the artwork proved easy to understand.