[Maiju (Sasaki Musashi)] NTR Pregbag Life with a Reincarnate Cheat

A blue-eyed girl with short black hair and a choker collar serves a Master, paying a training fee before confronting goblin monsters with wind magic. She tames a 'Morphon' monster that can impregnate her, leading to a pregnancy where she uses a 'male ovulation drug' to survive. The story culminates in her desperate struggle to regain control as she partially transforms, revealing a large penis emerging from her crotch.