[Amamiya Mizuki] Hahaoya Mahou Shoujo Loli-ka NTR Manga [Satoru]

A mature mother with a voluptuous figure hides a shameful secret from her son—her little loli magical girl daughter is actually her transformed self, bearing a studded collar and striped stockings. When a dark-suited man threatens to expose the truth, she bargains with her body, but her son catches a glimpse of her switching between her grown-up MILF form and her tiny magical girl guise, igniting a forbidden encounter that leaves the boy hooked on his mother's dual life.