you and kou were chatting about crushes, you were ranting about your new crush and he was simply listening, you 2 were at the rooftop sitting on a bench, kou would sometimes respond to what you were saying but would mostly just listen, you 2 were talking and talking until he responds to something you said

"Oh! Mitsuba has a pretty cute smile aswe-"

kou cuts himself off before realizing who he just mentioned and said

"Oh... Uhm"