The Ancient Magus' Bride: Jack Flash and the Faerie Case Files Vol. 4 (manga)
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?