Mariko Sada, who exudes a unique charm, descends upon the world of M men! She squeezes out sperm! She lives earnestly as a therapist and as a mother, but in secret she is a queen. She has a deep understanding of SM, and dominating men is her reason for living...! Mariko-sama, who enjoys persistent fellatio and is pleased to see the men's reactions of enduring it! Will you also become an M man and fall in love with Mariko-sama!?