What's under your Mask?

After my dinner with Ava and the others, I went to take a shower. When I came out, I saw that I had four missed calls from Sarah. Thinking it was urgent, I called her back while still wrapped in my towel. Within a couple of seconds of the phone ringing, she answered.

"Hello, Sarah."

"Oh, Sin! What's up?"

"You were calling me?"

"Oh, it's nothing important. I just wanted to talk to you about everything that happened at school today... You know, about that upperclassman who came and took you away. We didn't get a chance to speak after you came back, and I just wanted to check up on you."

"Don't worry, everything is fine."

"But Sin, I've heard some not-so-good things about him. They say he's a full-on psychopath and that most of the third years are scared of him. And to top it off, he's Katherine's brother. After what you did to her, he might want revenge. He could even take his anger out on the class."