Do I have to complete the Fire Lord subplot in the same term as I got it in Atelier Escha & Logy?
Solution 1:
No, you don't have to complete the bonus assignments in the term they're given. I had the same issue, and was worrying I couldn't complete all the assignments in the time frame.
When you move onto the next term, you won't get to complete the current ones, but, the very last term is special. It lasts a year, and opens up all your other term assignments for you to complete. So if you don't get it done now, you'll get another chance before the game completes.