newspaper and yearbook are always forced to work with each other for one reason or another. maybe these two always do the conventions together (along with their students), because sometimes the high school journalism conventions include yearbook. also, he coached soccer for his first and second year of teaching at tegesta (until he took his break, of course) so they could know each other that way as well. maybe constantly having the boys and girls compete just to prove that one coach is better than the other, however playfully. she's super cute so he'd have no reserves when it came to flirtation.