Zhao Lin returned to the dormitory from the bathroom and sat on his seat with a broom for nearly half an hour. Yet, the dorm remained silent without any duck quacking sounds, which infuriated him so much that he threw the broom aside and turned to climb into bed to play video games.

Before he did, he glanced over at Xie Shu, who was also sitting at his desk, and to his surprise, he found him working on CAD!

At first, Zhao Lin thought he was doing homework, but upon closer inspection, he realized Xie Shu had just started and was currently drawing walls. He racked his brain and couldn't recall any class that was still at such an early stage.

What was he up to...?