The time machine

The professor worked for many years before finalizing his invention: the time machine! It allows you to travel through the years, on a chosen date. However, it works thanks to a fuel of biological nature: the male seed. And to recover as much as possible, the teacher knows he can count on Luna, his student, who has been faithful for several years. She supported him in his project and is ready to collect the quantity of seminal fluid necessary for the proper functioning of the machine ...