This mystery novel featuring Keith & Bowman was written in Japanese at first, and was sold at the STAR OCEAN ONLY event, CROSSING SPHERES, held within COMIC CITY VEGA on August 25, 2024. Now I translated it in English with DeepL and my poor English. For all ages. A5 paperback. 192 pages. contents: 『The Ammonite's Wings』 The suspect in the murder at Lacuer Academy is... Keith??👀 Bowman takes on the unfamiliar role of detective to prove his best friend's innocence. And he started to investigate this case with Chisato. The party members appearing are Bowman and Chisato. NPCs are Keith, Nine, and Ellis. And many characters whom I created for this story appear. 『The missing in the royal capital』 Six years after the main story. One day, a special express train carrying the former Commander-in-Chief vanishes without a trace on the newly laid railways of Lacour.👀 While the world buzzes with excitement over the Lacuer Armony Tournament, Bowman is (forcefully) dragged by Chisato into solving this mystery... The party members appearing are Bowman, Chisato, Celine, Dias, Claude. NPCs include Keith, Ninay, Ellis, the King of Lacuer, Princess Rosalia, and the Commander-in-Chief of the Lacuer Frontline Base. And many characters whom I created for this story appear. All English. ※以前頒布した『アンモナイトの翼』の英訳版になります。 　内容は同書と同じものです。