The Ancient Magus Bride: Jack Flash and the Faerie Case Files manga volume 1 features story by Kore Yamazaki and Yu Godai, with art by Mako Oikawa.

Faerie-born Jack Flash and her human-born brother, Larry, run a detective agency in New York City specializing in crimes committed in the hazy boundary between the human and faerie realms. They never expected to receive a letter from an ancient magus of the Old World, but Echos, caretaker of dragons, has a task for them. An all-new The Ancient Magus’ Bride spin-off series!

The Ancient Magus' Bride: Jack Flash and the Faerie Case Files manga volume 2 features story by Kore Yamazaki and Yu Godai, with art by Mako Oikawa.

Jack and Larry have accepted a job from the mage Echos to retrieve a stolen dragon egg. With both human and fae help, they learn of an actress held captive in a run-down theater and the “gemstone” necklace she was given. The detectives search for their quarry, but someone else has beaten them to her. Now pursued by men in black suits, Jack and Larry must find the egg, the actress, and the truth.

The Ancient Magus' Bride: Jack Flash and the Faerie Case Files manga volume 3 features story by Kore Yamazaki and Yu Godai, with art by Mako Oikawa.

Changelings do it all, from mediating underworld backroom deals to tackling a bad case of lovesickness. Now, while raising the baby dragon they accidentally hatched, the faerie Jack Flash and her human brother Larry take on some new cases. But of course, none of them will go as planned!

The Ancient Magus' Bride: Jack Flash and the Faerie Case Files manga volume 4 features story by Kore Yamazaki and Yu Godai, with art by Mako Oikawa.

Jack and Larry are busy dealing with the typical New York City troubles when an unusual drug case lands in their laps. The “flowers” drug not only gets users weirdly high, it also lets normal humans enter the faerie realm. Jack starts investigating, only to run right into the mysterious man in black again. What does he want to show Jack and Larry?