Absolutely love the game so far. It's refreshing to play an MC that is confident and goes after what he wants without being a dominating creep about it. The bedroom/car/lake house scenes with the Mom were perfect with the MC telling her that, "yeah, this is happening so just say all that crap you need to say to make yourself feel better and then we can have fun".
I don't get the <prostitution> tag, though. Is that for future content? I didn't find any current content where anyone pays for, or gets paid for sex. Unless of course I missed something!
The neighbor is the <cheating> tag, and the sister can probably warrant the <virgin> tag since she's never kissed a boy before.
Looking forward to more content, including more tags like <pregnancy> with the homeroom teacher and possibly <femdom> with the Amazon gym teacher or the cousin (though I'd love to <maledom> her for the whole worms thing

). And of course <harem> to have them all (or just the 4 family members).
This is a really strong start and the <sandbox> is fine due to the very clear hint system on the phone.