Ochako Uraraka at the age of four has always been a single child but one day that all changed as she's introduced to her new adopted sister, Himiko Toga. At first Himiko was distant but soon enough Ochako managed to get her out of her shell and spend some quality sister time together. Since the two have been inseparable sisters and have enjoyed each others company. But one day Ochako decided to tell Himiko, that she wants to go to UA High to become a hero to help their parents with their struggling construction company. With hearing that Himiko was willing to join Ochako and forget about the previous school she wanted to go to. So with this decision made Ochako and Himiko decided to become great Heroes to help their parents.