Number of copies : ???
What's odd here? This is a 2-in-1 item!
At the time of the campaign for the movie of the same name, you could reserve your ticket and a special disc was given to you. Both ticket and CD were combined into one package, the ticket being part of the front sheet... So you had to detach it to go into one of the cinemas concerned by the campaign.
Here is the blue student price version.
- Rurouni Kenshin Ishin Gekito Hen (維新激闘編) promotion video
- Rurouni Kenshin The Ten Warrior Conspiracy (十勇士陰謀編) special movie
Screenshots taken here.