In this 3rd installment of the story, the My Hero world is now fully aware of the existence of Kaiju. Life still carries on though with Izuku and his classmates continuing to become future heroes. Izuku, however, starts to come across strange occurrences after being given the G-cells by Godzilla. Not sure what to do, the young hero turns to the king of the monsters in order to help him train and perfect this new power. But training must stop as space Kaiju like Gigan, Megalon and Orga appear. Along side them, a mysterious asteroid crashes onto earth, and with it, the dreaded King Ghidorah. Now Class 1-A and the Earth Defenders must come together to bring peace back to the planet. But these Kaiju are only the beginning of their problems.