Persona 3: Are We Still Twins?

Makoto Yuki lost his parents in an accident ten years ago. A few days later, his twin sister, Minako went missing. She has legally been declared dead, but Makoto believes otherwise. He doesn't know why, he just knows she's not dead. Now, by fate or destiny Makoto has wound up transferring to Gekkoukan High School in Iwatodai. The same city Minako disappeared in. Though with the clues he finds about her disappearance, Makoto begins to question whether or not he and Minako are still considered twins.
This is a fanfiction. I do not own any of these characters nor do I own the entire story. Atlus owns all the characters and most of the story. Also, do not get mad at me for using Makoto Yuki, the actual cannon name of the Persona 3 Protagonist instead of Minato Arisato, the fanbases name.