She Shouldn't Have Walked into His Trap

Derek let out a cold snort. He didn't want to answer the silly question.

Serina shook Derek's arm, "Please. It's very simple. As a straight-A student, how could you not know the answer?"

"You really want my answer?" Derek asked.

"Of course!" Serina smirked. She was ready to tell him the right answer!

"The answer is the pupil."

Serina's smile froze. "How did you know?"

Most people would think it another way. Once they got the answer, they would feel embarrassed.

Serina had planned to laugh at Derek, but he said it right!

"I also know that the pupil can be expanded to seven times its original size. Tell them about it when you ask them this question. They may admire you."

Derek gently knocked on Serina's head.

Serina rubbed her head and was unhappy about it.

She said to Derek, "You broke the rules!"

"Who said I couldn't break the rules?"

"You're so boring!"

Derek knocked her on the head again. "You are the one with dirty thoughts!"