Loose private parts, vaginal training, shame of becoming a wife captured by her father-in-law's penis, Aoki Rei HZGD-158

Ling, a sexually frustrated wife, is encouraged by her husband to tell her that he doesn't want to have sex because of vaginal laxity and discomfort. Stimulated, Ling begins vaginal exercises! However, her father-in-law, a doctor, finds out and deceives her by applying an aphrodisiac to her genitals under the guise of treatment...