I'm posting an idea i got, maybe some of you would like to play such a game, maybe even somebody alread got a similar idea. I'm not sure about GM-ing it myself, but if you'll like it than let me know.
In the very far future, possibly in a galaxy far away, countless planets and star systems compete for power, alliances, empires and hegemonies rise and fall, wars are waged on multitued technology levels and finally one powerful faction gains the upper hand on the others.
The new galactic empire, or whatever you call it forces all the petty kingdoms and states to surrender, making them it's vassals. They leave the old goverments when they were, but to ensure cooperation they take high-born hostages. Heirs of noble families, progeny of presidents and senators, kin of those who hold power.
The players assume the roles of those young people, taken from their homeland and placed on a planet that is both a maximum-security prison and a paradise of luxury.
They are to live a life of bliss amidst verdant gardens and crystal towers, but also their every move will be controlled, they will still be prisoners and breaching the boundaries will be dealt with strictly.
Many of these flower-youth are heroic personas, they might yearn to break out no matter the cost, some of them could despise each other because of vendettas and politics of the past.
Different cultures and different views on the world will meet each other.
Both hates and loves are to be born.
But the keepers of this secure paradise won't allow their passions to fullfil, as the dynastical lines are arranged without concern for their feelings.
Accept for idle pleasures, these flower youth spend their time learning.
They learn about the galaxy, practice fencing and martial arts, persue exotic arts and crafts...
It's a life in a golden cage, trying to rebel or make trouble will incur harsh punishment as the citadel is prepared to discipline even a heroic super-human.
Welcome to the crystal citadel, honored guests.
Well, we'd have a lot of fun with romances but also with conflicts, it could be a Star-Wars meets big brothers house or a serious drama. What the 'empire' plans to do with the inmates over time would be a mystery to solve. Planning a grand escape is a one option, exploiting the situation to do politics or just have with someone/at his expense is other.
And the punishment for setting foot in the forbidden zone(half of the base) would be a day in stocks, naked:D