The "Bakunyuu" (busty) and "Onee-san-tachi" (older sisters/women) elements of the title highlight the game's focus on: Archetypal Characters
If you're new to the series, here are some recommendations for getting started: Shota One RPG II - Bakunyuu Onee-san-tachi a Sa...
One RPG II generally follows this structure. You aren't looking for the strategic depth of a Dragon Quest here. The gameplay loop typically involves: Shota One RPG II - Bakunyuu Onee-san-tachi a Sa...