Takao visits his friend Shinji's house and becomes captivated by the sight of his mother, Risa's back, instantly drawn to her charm. From that moment on, Takao develops a strong fascination with Risa and visits Shinji's home again. This time, he boldly lunges at Risa, forcefully embracing her and shoving his tongue into her mouth in a violent kiss. Though Risa resists, she is overwhelmed by Takao's relentless foreplay and eventually orgasms against her will. Mistaking her physical response for consent, Takao believes his techniques are pleasing her and grows increasingly aroused, pushing forward with his assault.