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 the days of her humiliation. Her brother-in-law threatens her and forces her to have sex with her mother's new partner, and she is also humiliated in front of her fiancé. However, as she continues to be violated, Miki's feelings begin to change.