Where was this mentioned? I saw the dev and others talking about the reviews here but no mention of canceling part two, unless it was mentioned before and buried.This Christmas episode was divided in 2 parts, the part that was leaked to public doesn't have content with Seline, and apparently the second part is canceled due to many people complaining in this forum that it doesn't have sex yet, that don't want Christmas episode, etc.
EDIT:
Never mind, I found it. Looks like dev has decides no more specials or side-stories.
I hope this extra-long wait/delay to get the steam version approved pays out in the end for the dev.