Kana marries her boyfriend of three years after becoming pregnant, but she carries a secret she cannot tell the man she loves. Living under the same roof, her father-in-law decides to impregnate his son's dissatisfied wife. His older, more experienced cock grinds along her vaginal walls with slow, relentless thrusts before filling her repeatedly, as he tries to overwrite his son's seed and claim the pregnancy as his own.