...that the girl is Minami. I mean, they look really similar, don't they? And considering there's a 16-year gap and they haven't revealed Minami's age, it's entirely possible that she was something like 12 in 2014, making her 28 in 2030. Another possibility is that it was her sister, and perhaps something tragic happened to her. If that's the case, it could cause some increased dramatic tension between Minami and Akira, since he couldn't save her, and it may also cause them to form some kind of common goal, to avenge her sister.