Masato and his mother Tsubasa are poor and raised in a single-parent household, but they live happily. Even though Tsubasa is his own mother, Masato gets hard in the crotch almost every night, using her beautiful and seductive Tsubasa as a fap material. But he's not satisfied with that and finally makes a move on her body. His powerful thrusts repeatedly hit her deepest spot, and even after Tsubasa has climaxed, he continues to attack with more thrusts. "Stop it! I'm going to break!" Hearing her painful moans, the rhythm doesn't stop. At the peak of his climax, Tsubasa experiences a new kind of pleasure...