[Reducing Mosaic]HUNTB-649 On the day the world ends, the only survivors are girls, and I'm the sole guy. So when the girls ask me for help and we hide together, my heartbeat is so loud it can be heard, and indecently enough, I get an erection!

As far as the eye can see, I'm the only man on this Earth. When I was about to be crushed by loneliness, I met a girl. We decided to join forces and break through this situation together. But there are enemies lurking around… As we unconsciously huddled close to hide, my crotch stiffened from the long-forgotten sensation of a woman's body… An erection in such an inappropriate situation. Feeling disappointed in my own weakness, the girl had an unexpected reaction! Is this miracle sex only possible in extreme situations?