Married schoolteacher Namiki Toko is troubled by her inability to have children, until she realizes her workplace is full of young, perpetually erect students capable of ejaculating repeatedly. Targeting these students, she uses them as dedicated ejaculation partners, forcefully giving them creampie after creampie. Day after day, 365 days a year, she goes wild in the cowgirl position like a form of torture. She seeks out students willing to fill her womb with sperm, carving a path toward pregnancy.