Aniplex revealed a teaser for the anime Case Study of Vanitas ( Les Mémoires de Vanitas ). According to the official website, the series is animated by the studio BONES (My Hero Academia, Fullmetal Alchemist).
Check it out:
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ア
ニメ化決定
✦・━・✦・━・✦・━・✦・ ━・✦・━・✦呪いと救いの吸血鬼譚、開幕。
▶️ティザーPV公開https://t.co/GsolmQZMIv https://t.co/FviuFuaeXm #ヴァニタス pic.twitter.com/7poOsQplCN
— TVアニメ『ヴァニタスの手記』 (@vanitas_anime) March 28, 2021

The manga has been published since December 2015 in Gangan Joker , and has eight volumes to date.
Synopsis:
The story of the work talks about some rumors surrounding The Book of Vanitas, a mechanical grimoire of dubious reputation, which ends up attracting Noah, a young vampire in search of the salvation of a friend, to Paris.
Finally, The Case Study of Vanitas is scheduled to premiere in the summer season.