For anyone who is wondering about if this game is getting anymore updates and hasn't been following the dev's Twitter/Patreon, Roshutsu is dead.
All the following information comes from the Discord, and the dev's Twitter.
It was in a development hell for a long, long time, since around the release of Alpha 6 from what I can tell. The dev didn't know what they wanted to do with the project, and experimented with many different overhauls, such as one where Rika was a delivery girl, or one inspired by Degrees of Lewdity which was a full sandbox game. Around this time the dev experimented with many spinoffs, such as a multiplayer one, and an isometric one. All of these ideas died off for various reasons, but Roshutsu as a general Exhibitionism/ENF Stealth Game remained. The dev seemed to be really insistent on wanting a story for the game, but seemingly could never find one that they liked, and was running out of money to use on development.
Then, they abandoned Roshutsu entirely to work on a new project about a Nudist. It was just recently teased on the Roshutsu Twitter, but development details have been on the dev's Twitter for a long time.
You may or may not be interested in this new project, I don't know if I personally am or not because a lot of details have yet to be revealed, but it seems very clear to me that Roshutsu, the Exhibitionism/ENF Stealth Game featured on this page, is dead, and will never be finished.
Even if the dev eventually returns to this project, which I honestly don't think they will considering they seem to have lost all passion for it, I don't think it'll last long, and they'll likely soon drop the project again for the same reasons they dropped it in the first place.
I wish the dev luck on their future endeavors, but for the fans of Roshutsu looking for updates, don't expect any. The project seems very dead.