Educational mom Rieko strictly manages her son's life, earning praise from those around her for her dedication to his upbringing. However, her excessive control and harshness warp her son's psyche, and he finally gives in to his pent-up desires, taking them out on his mother's body. Though initially shocked, Rieko begins to feel pleasure from the act. Her body, drawn to her son's cock, starts forming a new relationship—under the name of education, and under the name of lust. Wearing slutty lingerie and teasing provocatively, Rieko further entices her son. The forbidden bond between mother and son evolves, under the guise of education, into deep, intense intercourse. Her son's thick, creamy load fills his mother's dripping, well-used pussy in a creampie climax that marks both the end of education and the beginning of a new relationship.