Feng has published an early release date patch for today’s Japanese release (local time) of Imouto no Seiiki. With less than 3MB in size the patch is fairly small and is only composed of a few small bug fixes. The issues addressed are an issue with a particular voiced line, several typos, as well as a single character sprite correction.
The update can be downloaded from feng’s own support site and installing it should not disrupt any previous save files. If an issue does occur they advice to try continuing from an earlier save.
Installing the patch should be fairly straightforward, just run the executable included in the patch and point it toward your game’s installation folder.
