Tight-Bondage Training Wife: The Unknown Secret of Her Dead Husband's Perverted Fetish. A Widowed Wife Drowning in Her Father-in-Law's Ropes, Natsuko Asagiri
Harumi married a man she met as a customer at a hostess club a year ago, and she's been enjoying a life of luxury with her wealthy husband. However, his nighttime preferences were somewhat unusual. Her husband couldn't get an erection unless his wife was blindfolded and tied up with ropes. Although she wasn't used to it at first, Harumi gradually became addicted to the pleasure of those strange nightly acts. One day, she receives news that her husband died in an accident during an overseas business trip. While Harumi is grieving, her father-in-law gently comforts her.