Princess Jellyfish follows 18-year-old Tsukimi Kurashita who recently moved to Tokyo to pursue her dream of being an illustrator. One evening, while visiting a local pet shop. She encounters a lovely young woman who comes to her rescue. Tsukimi soon learns that the Princess who rescued her wasn’t really a princess at all, She was really a Man. Kuranosuke Koibuchi, the youngest son of a political family. From then on, Tsukimi’s and her housemate’s lives were flipped upside down.