If you read the "more information" tags for this game. The game is in development,
If you read the news posts above by the developer, you can see the game gets an update roughly ever 7 months pending no delays. So roughly near the end of the year for another update and I am guessing it wont be done then either. Got to remember its free game and most AVN devs here on itch are solo developers. So nearly everything is slow alpha releases spanning over years. Want something complete, check out steam or GoG or Oppaiman for completed paid AVNs. Some completed paid AVNs here too, just not many.