P.A.R.T.Y. is a story about Setsuko "Patty" Kurisawa and her friend Ayaka Miyoru - a half-Japanese and half-Polish girl who often gets into trouble with her school life. Ayaka's younger twin, Hibiki Miyoru, is going to have a birthday party which still needs to be properly organized. And of course Ayaka needs Patty's help to get things done. Will they make it?
