Episode 1 is the introductory episode . It introduces main characters, plot, gives you impression what this game is going to be about. It is not a demo. It will take more than an hour for you to finish this episode. However, if you are the person who likes to skip the dialogues and see the art only, this game might not be for you.
Certain scenes might not be opened depending whether you have earned enough points of relationship between characters or whether you increased the level of debauchery. I will upload a walkthrough later after the release.