Teaching bored me; I wanted to spend my life doing nothing but biology research. Yet remaining at the school meant taking unwanted duties, including coaching the baseball club. Recently, however, I found a new subject of interest: Miho Satonaka, the diligent, high-achieving adult team manager. Her exceptionally developed body is obvious even through her clothes. I want to impregnate that body, and neither my instincts as a biology teacher nor my urges as a man will let me resist.