Unlockable: Secret Bonus Dungeon
You must finish all 8 Benevodon quests and complete the game.
Haunted House
First, go to Motis house and by the fireplace there should be a
coat rack. Go up to it and press A. It should say something ..
お客様の訪問には、システムの限界を超え、この資料の内容を隠してきた。