If you want to work as a writer on Kuni no Senso, then send a portfolio of your written works, be it a play, a poem, a novel, or even a Kermit x Thomas the Tank Engine fanfiction for all I care. As long as it's good aside from the obvious joke factor, then that's okay with me. Just make sure that you can write serious works as well because there isn't a large amount of humor in this show.