Challenge 115 is First Time.
There's a first time for everything, and JE has lots of firsts like first time on stage, first concert, first tour, first unit, first time a kouhai asks for clothes, first time a senpai acknowledges you, you name it. Also, clearly there are first kisses and first dates and lots of other firsts you could get in there if you want to take it that direction.
Whatever floats your boat. Don't forget you can still post Halloween things if you've let yours go, or go read what's there if you haven't, but you might want to clear your plate soon because next month will be Christmas requests!
any questions/problems go to myself or kira_shadow.