Sensei, Daijina Mono Ga Nusumaremashita (Kodansha Taiga) [Light Novel]

[Machine Translation] The legendary thief, Feres, steals even the things that have no form, such as love and courage. The thief left a card after the crime at an art gallery on Nagi Island! Yukiko, who has enrolled in the Lighthouse Keeper High School, along with her childhood friends from the Detective High School and the Phantom Thief High School, embark on an investigation. However, they cannot find what was stolen, and a teacher is behind the crime. The question is not "Who? It's not a question of "who" or "how" but "what was stolen? The question is not "Who?" or "How?" but "What was stolen? The birth of a masterpiece of authentic mystery!

愛や勇気など、形のないものまで盗む伝説の怪盗・フェレス。その怪盗が、凪島のアートギャラリーに犯行後カードを残した!灯台守高校に入学した雪子は、探偵高校と怪盗高校の幼馴染みとともに調査に乗り出す。だが盗まれたものは見つからず、事件の背後に暗躍する教師の影が。「誰が?」ではなく「どうやって?」でもなく「何が盗まれたのか?」を描く、傑作本格ミステリ誕生!