If you don't flee from any random encounter, read all the help, monster info and everything else on "data" section, grind for 150 SNP to buy 2x Cat Food and a Item Master, walk back from dungeons instead of using your Home Thread, explore all maps in hunt for treasure and get lost quite often, try solving the puzzles multiple times, and at one or two points you stop playing to drink coffee while the game clock is still running, you may get this time. Probably less. After all, I was enjoying the game >.> So I took some extra time on it. ^^' This game is composed by 30 story chapters, but each chapter is quite lenghty - can keep you busy for two or three days on vacations.
PS. Originally I didn't planned to post it here - this is why the caps are "Gold Island" instead of "CLEAR DATA". I loaded the file and saved again at Gold Island as I usually do before taking the shot.