The premise of the show is nothing too unusual: Tsukimi is geeky girl living in a building with other, equally geeky girls. None of them have any social skills or experience with men and they semi-jokingly refer to themselves as the "nuns" (a pun on the name of their building). One day, Tsukumi encounters a trendy, self-assured girl - who happens to actually be a cross-dressing young man - and the resulting culture clash leads to various comical situations.
Naturally, most screen time however is given to the female "nuns" and they're a varied bunch. The main character, Tsukimi, is a jellyfish otaku; although this is a rather obscure subject to form an obsession around, it works because any hobbyist can see parts of themselves in her behaviour, lighting up whenever the topic turns towards marine life and reciting useless jellyfish trivia at every opportunity. She's adorable. Living with her are a train otaku, a traditional Japanese clothing otaku, a Three Kingdoms otaku, a quiet girl obsessed with older men and a celebrated manga artist who neither leaves her room nor speaks. Each of the geeks is uniquely weird - and somehow uniquely unattractive to the opposite sex.
The quirkiness of the cast provides fertile material for jokes, and even the non-otaku characters are hilarious in their own ways. I laughed out loud on more than one occasion at the perceptive interplay between them. Princess Jellyfish is more than a gag series though; it also has an ongoing story, which manages to keep its momentum and reach a satisfying conclusion without relying on a second series which never comes, as so many anime do. The show also packs an emotional punch when it introduces some surprising romantic twists.
Even though it was obvious from the beginning that I was going to like Princess Jellyfish, I was taken by surprise by how addictive it was - I ended up watching most episodes back to back in a marathon because I kept wanting to see what was going to happen next. It's a shame that the older female demographic in the UK is so disinterested in animation because most 'normal' women I know would love watching this if they only knew that it existed. I might buy a second copy to give to my mother for Christmas!