The Principle of No Tolerance

Lu Suo replied with a simple "oh". He could not wait for Zheng Jiahao to leave. 

Once Zheng Jiahao left, Lu Suo glared at Song Yujin. 

"Why did you keep talking with him? I just went to the bathroom for a few minutes and you've already made a new friend?! I won't allow it!"

"..."

Song Yujin could not understand what Lu Suo was thinking at all. 

"I didn't!"

"Then why did you keep talking with him?!"

Song Yujin said helplessly, "I don't want to fall behind in my studies."

"In the future, don't talk to him anymore."

"..."

"Also, nobody is allowed to sit in my seat!" 

Song Yujin felt that arguing with Lu Suo was pointless.

"Okay."

"You can't let anyone sit in your seat either."

"... Okay."

"You're not allowed to play with others or make new friends."

"..."

Why was Lu Suo being so unreasonable?

Lu Suo shook Song Yujin's arm. 

"Do you understand?"