This isn't a save, but it is a step-by-step of how to get to the 5th town.
After you have beat the Tentacle monster, you first need to go back toward the 1st town (talk to the Captain in the 4th town first and he just will tell you to come back in a few days. This is the guy in the white uniform who is standing on the center pier looking toward the sea. There are 3 piers: North, Center and South).
Once you go back to the 1st town, walk into the Pub and learn that your Elf friend has become sick (or whatever is going on) and she needs a flower from the hidden Imp (Succubus?) area (that's the first area you fought in during the Prologue. It is also the first area you couldn't go into on your way to the 2nd town because you were too weak to go in).
Walk into the Imp area (((in case you forgot where it is, walk North from the 1st town and instead of taking a left (Northwest) at the fork in the road, take a right (Northeast)))), and play out the events. Once your friend is healed, talk to the Captain in the 4th Town again and he will take you to the 5th town.