An escape game. Why was the princess kidnapped?

Oh? In addition, I was kidnapped?
In order to regain a princess (Spica) kidnapped every time again,
I challenge the dungeon which many mysteries were picked with!
The purpose rescues a princess kept in the dungeon depths,
Escape in dungeon!
I solve the mystery that a journey demon king set, and let's advance!
I make full use of the item which I can obtain on the way,
I solve various mysteries, and save a princess!
I look like an RPG-like screen, but there are no all in the battle!
Please fully enjoy a demystification!
----- Hint of the game -----
Push the hint button if you come to a deadlock in a game!
The hint of a map displayed with the screen
You can tell me in pinpoint.
Because it is a screen scrolling-type map,
It travels the edge of map to the next map if involved.
I am involved just before a door if I obtain a key!
I will advance steadily!