I'm glad you liked it! As for your suggestions.
1. There is a high possibility of this occurring. If not in Day 3 then in later days.
2. I do plan on adding more of this.
3. Depending on your choices in game (Tyrant) or (Saint), Kana will have a spanking scene in Day 7.
Lastly, I don't have an ETA on the release of Day 3 yet. However it is currently being developed, progress and sneak peeks are available on FanBox and/or SubscribeStar.