Preparatory materials related to the Colorless Ultar Project, a series of materials under this title.
Nature of the data
These are short stories and vocabulary materials related to Ultar Research, and are not recognized as the main project or official game release.
Publishing series
The 'Ultaru Study' catalog lists this work as preparatory material for ENGINE SMOKER, preserving titles separately with the Door to the Moon World and the Merged Supplement.
Prepare the sequel positioning for the materials
In a November 2012 announcement, Hikaru Sakurai referred to 'Ultaru Ko ~Pinkerton Detective Agency~' as a sequel to the previous work, 'Ultaru Kou'.
Related entries
- Related main projects:Colorless Ulta ~The End of the Shining World~
- Related authors:Hikaru Sakurai
- Related Projects:Colorless Ulta ~The End of the Shining World~
- Publishing Associations:ENGINE SMOKER
References
- Hikaru Sakurai's works Wiki: Ultar Considerations
- Hikaru Sakurai Author's Blog: Comitia & Comic Market!
- pzerox: Colorless Ultar Data Project
Data compiled on: 2026-10-07.