Your name is Nia, you are 18 years old, and you have a twin sister that is different from you, basically because you both are identical, but the only things that made you similar were the face, height, and know everything about each other. Of course, being the oldest twin sibling, your sister Ria was the acceptable one.
Ria has long blonde hair, has D-Cup breasts, and wears skirts along with dresses that aren't too hard to walk in after putting them on, while you wear shorts, have C-Cup breasts, and have short orange bobbed hair. You also have freckles, because the reality is your mother was a redhead, while your father was blonde making you both twins. Later that day, as you were at the university, you notice something glowing, and went to discover it, while your roommate was out at the library during study hours.