Double bondage, sisterly discipline, beautiful mature women married into a family dominated by ropes—JUQ-121

Yumi and her husband, Yuji and Yuuji, come to their hometown to take care of their eldest brother, Kazuo. They are troubled by Kazuo's demanding and authoritarian relationship with him. Meanwhile, their second son, Jun, and his wife, Maki, also return to their hometown to say hello. Upon meeting, Kazuo gives Maki a strange look…