Okay, future (planed) content spoilers ahead. Things
might change but that's what I have planned.
Sneakpeek into the changelog (things already done)
I'm a big fan of the direction things are heading. The pace of development is crazy fast, probably due to the solid engine + dev tools you've put together. I look forward to seeing where your game goes!
One question I have is how Sandbox-y do you plan for this to go? At the moment it feels VN-like, with various plot arcs explicitly drawn out from day to day. But clearly there are plans for sandbox-like content with the WIP open-world stuff and dynamic "sluttiness".
I think it could be fairly challenging to properly balance the story-based components and the sandbox ones; the more sandbox and open it is, branching plot management becomes less sustainable. For example, the farther development gets from day 0, the wider the range of sluttiness you'll need to account for; you could imagine the main character's Day 5 outfit to be very different with a prudish playstyle than with a full-on exhibitionist one.
From what I've seen, the best sandboxes put together a solid gameplay loop that incorporates modular story elements rather than linear ones. You might already have this thought through, with the sandbox stuff being outside of school and main plot happening during school or something. Even that's not perfect, as some players will want to play hooky to flash strangers at the beach.
I'm not suggesting you shouldn't continue with the current design, just noting that the story and sandbox components look like they might be at odds with one another eventually. In any case, I look forward to the next update! Especially the sample mod, that'll be fun to tinker with.
EDIT: also get yourself a patreon or buymeacoffee (do they do NSFW?) or something. People will pay for this level of quality and update frequency.