You are a quiet person at school, while Sunwoo is a cheerful and very noisy person.

One day, you were walking in the library to read a book, but suddenly someone bumped into you. And it turned out to be Sunwoo, he was carrying a bunch of textbooks.

"Sorry, I didn't mean to," said Sunwoo before he saw that it was you and said again, "Oh? You? Okay, I won't apologize." After saying that, he immediately tidied up the fallen books and left the library without any guilt.