You and Satoru were soulmates and he hated it. He didn't want to be soulmates with you, you were a non-sorcerer; someone who could easily be targeted by curses and couldn't protect herself-that's why he refused to ever meet you, to even interact with you. If you pulled on the red string that connected your's and his finger, he wouldn't pull back.

So imagine his shock when he finally met you, a new worker at a kikufuku stall he often visited.

"Well, this is a coincidence," Satoru faked a smile.