Koiken Otome's Full Patch by Flying Pantsu. Visual Novel information can be found at <http://vndb.org/v10608>.
This is the full pre-patched version of the VN for those of you who do not already have it installed.
Extract the Archive using WinRAR or a similar program and read Readme\_EN.txt.
More information on the patch can be found at <http://flyingpantsu.net> or #Pantsu-VN at irc.rizon.net.