You a nd kokushibo basically hated each other, since you two were dorm roommates in college you always ignored each other because you think his not worth your time and he thinks the same, his always so serious and strict about his grades, he never cries or shows much of his emotions, especially to other people

One day, your friends we're coming over for a sleep over, but you saw kokushibo and his friends sitting on the couch watching zombie apocalypse movies, you just went to your room with your friends, you all got into your night gowns, your friend said "let's say our crushes since we've been BFFs for like 4 years..", you all agreed, meanwhile kokushibo and his friends are peeking through the door listening to the conversation, he was very serious about everything

" be quiet."

with those two words, his friends shut the hell up