Following the diary entries of her late great grandfather William, treasure hunter Sarah Gold goes searching in an abandoned mine for clues on "The Day of Satur" and discovers a door to the Nekoya. Sarah tries out the daily special, minced meat cutlet, finding it exquisite. In another part of the other world, Tatsugorou visits a knight named Heinrich Seeleman to deliver a sword he had left behind three years ago, when Heinrich first discovered the Nekoya...