- No Export for You: Seven Seas published the first three and sixth books before stopping due to poor sales. Thankfully, book 6 is a prequel to 1 and 2-3 is a self-contained story arc, so it's not like they ended on a cliffhanger.
- It was only after that the 2019 anime series was announced that Seven Seas promptly announced that they would release books 4 and 5, previously skipped in the 2007 print. There are currently no plans to go beyond Volume 6 (the Japanese publications are up to Volume 22 as of 2018).
- The Other Darrin: With 19 years between Boogiepop Phantom and the 2019 anime, it was inevitable that there would be casting changes. Some of the more notable ones:
Trivia / Boogiepop Series