Gaku, who lives in a father-son household, had a secret admiration for his friend's mother, Yuka. And then, somehow, those feelings turned into love... At that time, Gaku felt a sexual awakening at the lewdness he happened to witness, but he was spending his time in torment because he didn't know how to release it. Knowing his troubles, Yuka secretly initiates him... Then, Gaku, unable to suppress his reason with the first stimulation he felt, impulsively assaults her. Yuka, who continues to be fucked by his dick rhythmically like a beast, can't stand it anymore...
