This would be a spin off from the series of Avatar: The Last Airbender, though with original characters, concepts, and our own little plots/story lines, twists and what not. It keeps the same idea that the world is at war once again, years after the peace brought on by Aang the world prospered. Though in the last stages of his life he faced an old, powerful Azula who once again sparked the Fire Nation into war as the Fire King Zuko fell ill and died. Years later Aang passed away and so did Azula, leaving the war to the next generation. Years passed and finally the Avatar of the water nation was recognized. Though through training he soon fell as well to the war, not being able to complete the elements as there was no one to teach him the mastery of Air Bending. It is the goal of the Fire Nation, being lead by descendants of Azula, was to destroy every Avatar until the next Avatar was born into the Fire Nation in which case they could harness and warp the power of that child and use it for their own selfish reasons...thus turning the avatar into a mass weapon of destruction.
The only thing that stood in their way now was 16 years later the Earth Nation Avatar was discovered, a boy by the name of Takashi. The Fire Nation needs to get to him and kill him, then wait another sixteen years for themselves. However, of course this new Avatar would be heavily cared for and protected and assigned to masters right away.
This is when the females come in, I was thinking at least 2 females, aging from 18 to 30 will play the parts of the masters that teach Takashi Fire Bending, Water Bending, or even weapon mastery and what not. They would be presented and meet this avatar at the age of 18 when he is ready after mastering Earth bending completely as well as the sill of the earth Nations fighting style. He would of course have been a key role in a few battles to ward off the fire nation. Now that the Fire Nation realized the resistance of the earth Nation they had retreated back a bit to gather up their strength, resources, and plan their next step.
So Takashi and his the female sensei would travel from place to place between the earth and Water nation to train as war as take place in certain key battles, missions, quests and other things. They would also visit the old air temples to try and get a grasp on air bending as Takashi realizes that with only Earth, Water, and Fire in his arsenal he will need the help of the entire world and anything else he can get in order to stop this war. Technology and weapons have changed dramatically over the past century and a half.
So there would be action and adventure in this, some political vies and discussions in the terms of war, planning, plotting, things like that. There would also be a romance, which is kind of why I would need bisexual females. A relationship of passion being formed between the avatar and his bending masters in privacy, behind doors and away from the war. They would become close and good friends, open with each other, then forming into something more between them. What twists and turns it also takes depends on who is interested and what you are looking for.
PM me or drop a line here. I am always open for discussion for ideas, questions, suggestions, anything.