You are rushing it, Kyuu. :D Slow yourself. Take on step at a time and be patient. You have a good thought, roll on that. Don't focus so much on the title. Not yet.
Hm. Think on it. ;) A lot of people does name their book after it is done, if you realize it or not. It took me days to figure out the name of /16th only for it to come to me after I finished the prologue. So don't let the title stop you.
You know that interests me, because you have never done something like that. What does one do while sealed, THINK. You should go on with it, but how are you going to make word amount (does it have a word amount?)