Masochist aunt KAORI who was tied up by the masochist brothers and became a prey to their cunning dicks.
Brothers left at KAORI's house. He tried to admonish his older brother who was bullying his younger brother, but he retorted that his aunt also enjoyed being bullied by her uncle. He was watching her SM play with her husband. And he makes a promise to be tied up just once on the condition that he won't bully her or peek at her anymore. This ended up stimulating her M temperament, and her aunt felt excited as a female... This is an edited version.
