Can this run on 32-bit operating system, and seiyuu danshi too?
If you're asking if the full game will be free, I would say no. I'm guessing the purchase price will be similar to this dev's previous game, Seiyuu Danshi, which was about $33 USD.
However, as someone who's played Seiyuu Danshi and the Demo for Banana Ranch, I can tell you with 100% confidence that the purchase price is WORTH IT! You get a LOT of quality content, MANY hours of gameplay, and the games themselves have high replay value :D