Wafuku kinshin les: Gibo to juban musume

和服近親レズ　義母と襦袢娘

Also known as Closely related lesbian Stepmother and undergarment Daughter in Kimono, 和服妻の淫謀 義母の破廉恥な企み, Wafuku tsuma no inbô: Gibo no harenchi na takurami

Hisae, a woman living in a mountain village, receives a marriage proposal from Ikuo—a student of her mother-in-law, Miyako, who is a shamisen instructor. However, Hisae's father, Kan'ichi, opposes the union, leaving the couple deeply troubled. Unable to stand by and watch, Miyako attempts to persuade Kan'ichi, but...