Installation requires: a copy of 7zip at 17.01 beta or better (available here, download link for 17.01 beta is here) or WinRAR at least 5.40 beta 4. (WinRAR is available here)

We recommend 7zip over WinRAR, but either will work.

1. First, place all of the parts in a folder, which should look like this: 

2. Open up part 1 in WinRAR and hit extract. When it's extracted, it should look like: 

3. Click on sakusaku.exe to run.