The development status of Succubus Research Diary looks like this at the moment:
Music & Sound: 100%
Overall progress: 93%
There is but one event CG yet to be completed before the graphics are ready. After that, I will dedicate my time to write the last chapters of the story. Considering that testing and editing will also take some time, I expect that it will take at least one more month to finish the game. I will announce the exact release date soon…
but not too soon.