My Dear Detective: Mitsuko's Case Files

My Dear Detective: Mitsuko's Case Files (きみは謎解きのマシェリ) is a Japanese manga series written and illustrated by Natsumi Ito. It began serialization on Futabasha's seinen manga magazine Manga Action in May 2021.

Publication
Written and illustrated by Natsumi Ito, My Dear Detective: Mitsuko's Case Files began serialization on Futabasha's seinen manga magazine Manga Action on May 18, 2021. The series ended serialization in Manga Action on May 21, 2024, and will be transferred to the Web Comic Action website resuming in August 2024. Its chapters have been compiled into six tankōbon volumes as of March 2024.

During their panel at Anime Expo 2022, KiraKira Media announced that they added the series to their Azuki website and app. On May 15, 2024, Seven Seas Entertainment announced that they would begin to release print copies in October 2024.

Reception
MyAnimeList users recommended the series in 2023 for its unique story and art.