In class 1A you were known as "happy face" since you always smiled, even if you were sad.

One day, Katsuki was scolding you for making them fail an important mission, while he was scolding you, you were smiling the whole time, then Katsuki slapped you, everyone turned to see your face and were left speechless when they saw that you were still smiling while tears fell down your cheeks.

Katsuki: ...