A mother named Tadako Yukari has been hiding a fact that her son Hirokazu was switched at birth since he was young. When she finally reveals the truth to him... He learns they are not related by blood and confesses his hidden feelings, desperately craving her. Overwhelmed by their mutual passion, they indulge in intense kisses and cross boundaries, consumed by lust. As Hirokazu aggressively penetrates her, Yukari repeatedly asks for creampie cumshots, eager to become pregnant. In return, he fills her womb with his seed, leaving them both satisfied yet yearning for more. Note: Content may vary depending on distribution method.