Ever since childhood, Tsukimi Kurashita harbored dreams of becoming a princess. However, at 18, her reality is far from regal. She's a reserved girl engrossed in jellyfish, residing in Amamizukan with like-minded women who shun fashion and men. Tsukimi's world shifts when she saves a jellyfish and meets a sophisticated, seemingly princess-like individual. To her surprise, the overnight guest turns out to be not a woman, but a man.