[Machine Translation] The detective, Lady Arisu, is on the case of the bombing of a masterpiece. Yukito, an apprentice butler, and the young lady board a luxury cruise ship where a masterpiece is on display. There is a perfect butler who is assigned to the cabin, and I have no part to play.... What is the real aim of the culprit hidden in the criminal's announcement? The young lady will solve the mystery with her excellent deductive reasoning. From intermediate level of elementary school.