Takashi, the son, harbored intense desire for his mother Akari. While his father was away on a business trip, overwhelmed by uncontrollable urges, he attacked Akari. Initially resisting fiercely, Akari gradually began to feel pleasure after being repeatedly violated. Through this cycle, her heart slowly began to waver. As Takashi's impulses clash with Akari's resistance, their relationship evolves through a complex flow of emotions.