It centers around a household of awkward female otaku, each with their own unique obsession. Trains for Banba-san, old men for Jiji, China's three kingdom's period for Mayaya, kimono for Chieko, and jellyfish for the heroine: Tsukimi. They don't have jobs and can't function around men or normal people. Tsukimi's jellyfish is rescued by a beautiful woman who turns out to be a dude cross-dressing, and there's a hot older brother that kind of reminds me of Sak. And really I think you should just watch the series or read the manga because I can't do it justice. It's hilarious. (It's on Youtube under Princess Jellyfish)
PLUS, there's Star Wars and movie references in the opening! Here, watch:
Kuragehime OP from Mizuiro on Vimeo.
But anyway! The point of this is that there's an episode where they make little jellyfish plushies to sell at a swap meet for 500 yen.
|(screencaps from the youtube vids (ep 8))|
An embroidery hoop, some cute fabric, a couple buttons, stuffing and lace/eyelet trim is what you'll need: