Is this ever going to be available for free?
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Honestly what I recommend you do is simply buy the game for $1.55, as once bought all future releases will be free. And I don't think so no, as the MC seems to be having fun with the whole town atm. Episode 7 is Rita and Naira focused, literally, (you'll see what I mean when you play it), and focuses mostly on the rivalry between the two during a Halloween event in the town.
Spoilers:
Rita makes a mess of the whole event, and gets rough used by a big wolf at the end, and then releases it on the already wrecked town.