I don't think it's posted here but on Apr 1st, Warumiyo posted an article regarding the new game of Massage series.
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Jist of it is new system, new character(a flatty idol this time) and also managing sims(yes, they finally adding that MC needs to pay rent, woohoo). Also MC can man the computer and monitor idol's status(basically expanding it into monitor system instead of using the clip board).
The status of the current game with more characters? Radio silence, my guess that the game didn't sell up to expectations(
can't imagine why). As for current update for Mari? No kiss scene currently because DLsite sales hasn't reach the milestone(Warumiyo commented in the article to the question).