Lord El-Melloi II's Case Files {Rail Zeppelin} Grace note - A Grave Keeper, a Cat, and a Mage is a special anime that premiered in fall 2018, produced by TROYCA.

About the production: the story comes from a light novel, there is 1 episode of about 25 minutes and its current status is "finished".

Its main genres are drama, fantasy, mystery and supernatural, with themes such as Magic, Foreign, Male Protagonist and Urban.

On AniList, Lord El-Melloi II's Case Files {Rail Zeppelin} Grace note - A Grave Keeper, a Cat, and a Mage has an average score of 70%, a good score, and appears on 27,563 users' lists.

The franchise continues in or follows from: Lord El-Melloi II-sei no Jikenbo: "Rail Zeppelin" Grace note.

As one of the Lords of the Clock Tower as well as the department head of the Modern Magecraft Theories department, Lord El-Melloi II holds yet another lecture for his diverse array of students. After the post-lecture meeting with other Clock Tower nobility, he throws out a few insults at the fellow Lords that are interested only in their internal power struggle, but he quickly receives a counter-curse in retaliation. On the following day, while in transit with his apprentice Gray, he notices a cat ran over by a car. It's the stray cat that frequently visited his room as of late. Lord El-Melloi II realizes that this was an attempt to take his own life, and commences a perpetrator hunt along with Gray, Flat and Svin. (Source: Crunchyroll)

Official synopsis from AniList.