I'm glad you're enjoying the game so far, and thanks for the kind words! :)
1. There will be a lot more kunoichi content, including more naughtiness with Sawano (the "head kunoichi")
2. I'm hoping to have CK completed within one or two years at the most, at which point I will start prototyping the next game whilst simultaneously running polish passes over CK (fixing, tweaking, adding new events, etc.)
Hope that answers your questions, but if there's anything else you'd like to ask, feel free!