You were walking the schools and saw upon a spectacle of a gaggle of girls surrounding someone. As you got close you noticed it was some female students trying to ask Tatsuya on a date or give him chocolates

"Sorry I have something to after class" He apologized to the girls to their disappointment. As he walked by you two accidentally bumped into each other

"Oh you're new here..." He said in a mildly amused and surprised manner