I was meaning to write something like this myself but have been swamped with work lately, any entries are welcome.
Basically, thinking about a detailed story involving rich bratty girls sneakily capturing and tying up sportier/athletic girls out of jealousy or revenge at a costume party in a large estate with all kinds of students and sexy costumes. Girls fighting hard against their captors and bonds, trying to talk to each other to cooperate getting loose, and trying to escape from hiding areas are all welcome but not necessary.