Jellyfish Princess comes to mind. It's a "josei" genre anime --- anime aimed at woman collage age and up. It's short and sweet at about 11 episodes, but if you want more the manga has 17 volumes and there's a live action adaption too,

Synopsys: Tsukimi Kurashita is an introverted 18-year-old girl with a passion for jellyfish who has been living in Tokyo for six months in the hope of becoming a designer. One day she meets a beautiful young woman, a princess.

Themes: Gender Bender, Romance, Comedy, Fashion