very rough idea that occurred to me earlier. have you ever heard of xenoblade? no biggie if you haven't, I haven't actually played any of the games (does super smash bros count?), but I really liked the premise [s]and the art[/s]. really bad explanation incoming. 

so like... there are these "blades", I guess, who take physical forms when you like... touch 'em or something? an exchange of power/trust/yadayada most likely. so, think soul eater but more sci-fi because it's not death city and you're not highschool students. in xenoblade, you're like... looking for something, I dunno, what's with that extremely long Wikipedia summary, but in this you're all going to be enlisted in the army! so a futuristic war, alright, and these coolio masters and their blades are like the secret weapons. the a-team. and guess what? they can be sixteen years old if you like!

blades are probably like.... robots.... or something.... oh! I know! what if they're experiments by the government that have just now reached maturity? and there's like a village that "grows" them, or whatever, 'cause they gotta be born first through subjects, right, and now that the first batch of these superhuman fighting machines are sufficiently raised they're going to fight alongside their handlers, because it can be hard to control their powers...

hmm. that's all I can think of, for now. I wanted something sci-fi but also kinda lighthearted and hopefully a bit of romance too. think stuff like fire emblem awakening, xenoblade chronicles, or tales of zestiria. tell me if you wanna hear more.