[Pentacle (Shimipan)] Mother was a woman 4 [innyinny]

Suguru buries himself deep inside his mother from behind, her enormous breasts swaying with every thrust as he gasps about how incredible she feels. She moans his name with a flushed, sweat-slicked face, pressing her bare sole against him while asking whether any girl at school catches his eye—and when he admits there's no one, her satisfied smile promises their secret can keep going. But a shy classmate named Kimura arrives at the front door, threatening to shatter the exclusive arrangement between mother and son.