The Dev recently made a post on Patreon explaining why we've had no update in so long
yeah, he's making a different game, i noticed while playing the game that it would actually be hard developing it considering that there is a lot of branching to the story as a gamedev myself i know how hard to make animations and write story telling. The dev mentioned it on his patreon aswell how it affected him. the branching story system is just way too complicated, it's like making a multiverse when you haven't even finished making one.
i hope he still finish the game even without the branching and just the original plot for the girls.