A decent enough demo for what's expected. There's enough text here to -almost- consider using ren'py instead, but the RPG part is fairly decent.
Combat and skills are solely balanced around HP, which I think works out in the end, given the story and lore.
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As far as I can tell, the TFs in the game are already said and done; instead this story looks to explore how the characters live with and utilise their transformations.
Maybe it could be worth having the 'evenings' character slowly pick up traits of the girls she spends time with? Either way, it's got good potential and it'll be interesting to come back in a few versions' time to see how polished it becomes.