Part 2.5 is an album released made available on Numtack05's personal blog for free, downloadable in a ZIP file. It contains a collection of exclusive songs taking place between Part 2 and Part 3 in the series, having 8 tracks in all. It also comes with a booklet and certain images drawn by Putin-P for the series.
- A Sheep is One Animal!
- Flourishing Scent
- My Heart is Pounding ♥
- The Twisted Emperor ○
- Bonus Track
- The album is the only one without songs included in parts of the series.
- All songs in the album take place between Parts 2 and 3, as indicated by the title.