Tsukimi Kurashita has wanted to be a princess ever since her youth. However, at 18 years old, she finds herself far from that dream. Instead, she has become a plain and shy girl who spends most of her time and money on her biggest obsession: jellyfish.

Tsukimi lives with her fellow niche hobbyists in the all-female Amamizukan apartment complex, where the two most important rules are to avoid stylish people and men. Tsukimi has always abided by these rules until one evening—while rescuing a spotted jellyfish—she encounters a classy, princess-like woman. After allowing the girl to stay the night, Tsukimi is shocked to discover that the person is not a woman at all.

Kuragehime won the Kodansha Manga Award in the shoujo demographic category in 2010. It was adapted into a live-action film in 2014, and a live-action television series in 2018. The series was published in English as Princess Jellyfish by Kodansha Comics USA as omnibus volumes from March 22, 2016 to June 5, 2018. Crunchyroll also published the manga digitally and released the first four volumes of the manga on July 15, 2015.