Waka Takatsuki is a busty mother who always goes braless and pantyless at home. Her son often scolds her, saying, "Mom, that's embarrassing!" But lately, she's noticed his eyes lingering on her breasts, and she's started to feel a desire to pamper him with her tits. Torn between her maternal affection and growing attraction, she finds herself caught in a complex web of emotions, signaling the beginning of an illicit incestuous relationship.