The reunion for Class 2-8 of Jesan Boys' High School.
Example 1
"You knew I'd come, didn't you? To the reunion."
"I didn't know for sure."
"Liar. I have nothing to apologize to you for."
"Nothing to apologize for... I think it's better if you just don't."
"What?"
"Because then I'd start feeling sorry for the things I'm about to do to you."