The first game has 5 chapters, but Zion released only a part of chapter 5, the final batlle with the Leaf Clan Succubi.Is the main game complete and the side story just extra, or is there supposed to be more to come?
Edit: apparently the main game is part 1 of a trilogy and he's working on the second game. The side story is just a different game altogether to keep us occupied until the second game releases, and there's something about a tribe update (I have no idea what that is though). I'll probably just wait until all 3 games are finished (which may take decades, who knows)
You can found your own tribe in the game, through your interactions with the Love Interests. Zion was planning t expand that even further, and I thing he suffered scope creep, because the plan for it is ambitious.
The tribe update is basically that second half of chapter five.