The first compilation of the "Unexpectedly, Sumata OK!" series! Feeling sorry for me, who has never had a girlfriend for as long as my age, my beautiful and sexy stepmother says, "It's okay if you just rub it," and gives me a sumata! Not wanting to miss the biggest lucky chance of my life, I insert my penis into my stepmother's uterus while she is aching! And then, with a powerful piston that leaves no room for it, I even ejaculate inside her vagina, a dreamlike 360-minute virginity!