Doki Majo Plus Cheats :
BeAting the game a certain number of times will unlock the following:
When you first beat the game, after the credits, it will ask you to save. Doing so will add a star on the save file as well as unlocking Encyclopedia, Extra Episodes, Gallery, and Survival. Now you can start the game over again with the star'ed save file and beating it again will unlock Free Witch Check.