Big-breasted young wife swapping - A lewd habit of playing with beautiful wives -

The Hosaka couple end up returning to their parents' home after their husband, Yasuzo, loses their job. His brother's wife, Rion, welcomes him with ease, but his eldest brother, Shuichi, harshly scolds Taizo, who is returning. "Since I've come to this house, Eri will follow the customs," he says, but Eri, who knows nothing, doesn't understand... A while later... As Eri is hanging out the laundry, she sees Rion devouring each other with her second son, Ryoji. Unable to hide her upset, Rion begins to talk about the customs that have passed down in her house...