A 20 year old Birthday girl gets held down by roommates for birthday spanking. They get carried away and tie her up. Later they invite friends over for more spankings. Surprise party in the evening involves the girl's parents and siblings who show up for more spankings.
Most writers here will want to take this scenario to a full-fledged non consensual gangbang but wonder if it could remain a lite bondage, fun loving, groping, exhibitionist, spanking day. With three basic acts with 3-4 spankers during each act having nine or more of the same scenes, how to make each of them different enough to be worth reading?