Mako Oda is a beautiful girl known for her stunning looks and extra large breasts, living her dream as a kindergarten teacher and leading a fulfilling life. However, one day, after scolding a disobedient child too harshly, the child suffers a mental breakdown. Deeply shaken by the incident, Mako decides to transfer to a different daycare—until "me," the child's father, appears. Wanting to keep her past hidden from others, he demands a humiliating apology. Taking advantage of Mako's resistance, "I" slowly torment and manipulate her, leading her into complete POV-style training. As the process unfolds, Mako's mind gradually unravels, sinking deeper into pleasure and submission.