In the year 1972, the world of inventions have begun. Our President Richard Nixon found that their were still creatures different from humans that survived in the United States much worse than the foreigners that came to our country after the war. His assistant pointed out a puddle of green liquid 25 miles away from the White House.
Nixon sent his national guards to investigate it, as they got there. One of the soldiers stepped forward, and after touching the liquid, the others saw him start to transform. The soldier takes off his helmet, to reveal that his hair has extended, his face became more feminine, horns sprouted from his head (one bigger than the other), and his ears became pointy. Next the soldier's body shrinks causing him to become the height of a child, while he sprouted D-Cup breasts, his privates change, and his mind became childish.
The soldier has become a hobgoblin. Without any memory of her past life, the hobgoblin uses the gun in her hands, and fires at the military she was working for. The military guards retreated to the White House, telling President Nixon about what happened. Since then, the M.G.T.C Foundation (Monster Girl Transformation Containment Foundation) was born to search, and contain any monster girl either female, or shemale, and have some human test subjects interact with them. Each test subject is given a jumpsuit of any color, and kept in the lowest room below the other monster girls.