chapter 1 - 4 is disc 1 took me 10 hours. but usually its around 8 hours if your a little more speedy. chapter 5 - 9 is disc 2 took me 14 hours, don't kno how long if your super fast. and disc 3 is of course chapter 10 - 13 and i haven't finished yet so who knows how long but its taking forever lol.
yeah disk 1 took me about 7 hours some time take for pausing for food runs.. Im at 20 hours now and still on disk 2, just started chapter 8. but I also spent a couple hours farming in chapter 5 and at the end of chapter 7.