Pen is going to be an RO. I'm not sure at what point it is going to be presented as an option in the game but it will for sure be this book. Also still unsure about whether there will be a poly route. If there is, it will be a V poly.
I don't know how many chapters there will be. I don't plan my chapters out and instead just kind of go with the flow. I do know it will be longer than book 1 so over twelve chapters.
And as for how many books in the series, there will be three in total.
I'm so glad you are enjoying it!