Lord El-Melloi II-sei no Jikenbo: "Rail Zeppelin" Grace note - Hakamori to Neko to Majutsu-shi

ロード・エルメロイⅡ世の事件簿 {魔眼蒐集列車} Grace note 墓守と猫と魔術師

Years after the Fourth Holy Grail War, Waver Velvet becomes the head of the Modern Magecraft Theories department at the Clock Tower, succeeding the title of Lord El-Melloi II. Waver and his apprentice Gray set out to find the truth behind a mysterious shadow that stalks them, while trouble brews among the mages of the Association.

(Source: MAL Rewrite)