LN is ongoing and slow so let me recall since it's been awhile...
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As of Vol 9 no, they are not together but remember that Mao Mao is really as close to a female Sherlock as we can get (i.e., not really into relationships and people in general, smart but couldn't care less about knowledge she's not into, etc) and she also understands her position well. Japanese LN is in Vol 4 and I think I bread somewhere that Jinshi confessed but not sure if they are together.
It hasn’t yet occurred in the novel (I am currently reading vol 11) but there is progress. I especially love the last chapter of vol 8 - I keep re-reading it
The fun starts end of vol 3, then end of vol 4, gets even better end of vol 6, and then just keeps going. Apparently I have heard even more development in vol 14 of the light novel, but there isn’t an English translation to that yet - but as far as I know they aren’t officially together even in the original japenese yet - kinda but not quiet either.
in manga (づ ̄ ³ ̄)づ
And thanks for the volume updates! It seems we'll be treated to consecutive uploads covering this whole volume ლ(´ڡ`ლ)