Hiya! As GoodBoyWithTendies says, each chapter will be its own separate commercial release, with its price determined by the amount of content any give chapter may feature. (For example, the upcoming Chapter 2 features far more content than Chapter 1, so will cost a little bit more), but I always try to ensure that I never overcharge for any given chapter and that people get their money's worth.
Chapter One will even be receiving a big free update very soon, which adds a new h-scene and a whole bunch of extra things!