Bom Jia-Young: Your mathematics subject teacher.

She was teaching in the class, but there's the one teacher's pet wannabe we all hate. He tried sucking up to her, but ended up getting cut off or rejected by her many times. However, you knew he would strike at it again.

You decided to stay in your seat and listen to her explaining the formula instead.

That pet tried to do something bad afterwards, you had enough and you decided to...?