i have another question, i was now on the quest to chosse between rebellion or side goverment in dorgania, what choice is best for the game?? or to unlock some CG..... and then i make mistake when i buying the cat slave, i choose just buy her, not try her... now she just summon in my castle and do nothin to me -_-
You're probably on the step where you have to go to the bottom right corner.
A full list of each step can be found here: https://renryuu.miraheze.org/wiki/Riddles#Sparky's_mine_cart_challenge_2