Noka-chan, who loves penises and often peeks at the bulges of boys changing clothes. One day, while watching a boy change his top half naked, she wondered, "Why do men have nipples?" After being told that nipples feel good, Noka-chan starts practicing with the nipples of the boys in her class! "Ah, pinching the nipples made my favorite penis get hard! How fun~" She straddles it herself and inserts it in a cowgirl position. While pinching the nipples, she performs piston-like thrusts and ejaculates inside!!
