From father-in-law to son-in-law, anyone can buy this. Thong-shaped underwear tightly bound to mother-in-law as a slave. Genma Yuri RBD-37

Akane (Mayuri Honma)'s mother lives as a housekeeper in the home of Ittoku Kazuta, a popular author. Ittoku, who has a penchant for BDSM, secretly abuses Akane's mother and treats her as a sex slave even after their marriage. Akane, unaware of everything, is subjected to Ittoku's manipulation and forced to marry the editor-in-chief after her mother's death, her life continuing to be bound by his control…