HBAD-264 My sister was raped by her sister's husband...I never expected my fiance to be cuckolded by my brother-in-law Miki Shibuya

Miki heads to her sister's house to introduce her fiance to her sister, where her brother-in-law catches her eye, but she ends up seducing him without realizing it. She steals her sister's attention and gets raped by her stepbrother. Then came days of humiliation. Threatened by his brother-in-law, he is forced to have sex with his mother's new partner, and is humiliated in front of his fiance. However, as she continues to be raped, Miki's emotions begin to change.