This Different Future
[http://archiveofourown.org/works/1684343] - - public:opalsong
The Professor he knew was a stern though caring man and he had a welcoming smile like that of a father but it was sometimes too stiff. The Charles he knew from the past was bitter, reckless and stubborn. This Professor though, was very much like the Professor he knew but he had a—dare he say it—tune to his voice and a skip to his er…wheeling. Logan couldn’t really put his tongue on it but there was just something. (Where Logan tries to figure out just what's so different about this future with no Sentinels out to skewer them like it's BBQ night all day, everyday)