Sasshi and Arumi find themselves in what appears to be a Western-style fairytale castle, with Papan (Arumi's dad) as the King and Ms. Aki as the Queen. They ask the young kids to slay a vicious demon and they give them some gold coins to buy equipment. Unfortunately, Arumi spends all of the coins to buy an amulet and Sasshi is continuously killed and revived, because he has no weapons. However, the amulet becomes effective when they face the demon, the last boss: it makes him grow a...big bust and then explode! The demon turns into a little "oni" (demon of Japanese ...