Takeshi moves to Tokyo to stay at his older brother's home while preparing for his university entrance exams. It's been a while since he last saw his sister-in-law, Maria, who works as a gym instructor and is a sought-after married woman known for her toned physique and G-cup breasts. Takeshi becomes captivated by her allure and plots a way to get close to her. He obtains an aphrodisiac online, mixes it into her protein shake, and gives it to Maria while she's working out in the living room. Under the drug's influence, her body heats up and she begins masturbating, touching herself while remaining conscious. Watching her, Takeshi makes his move—but it's Maria who ends up begging for his cock. Hardcore NTR, Maria Chihaya creampie debut! Experience the thrill of dominating a married gym trainer's sculpted, desirable body!