Senior Lu to the rescue

Zhang Feiyu was at a loss for words. "Di-Did that illusion actually work?"

Huojin said, "It's indeed difficult to pull off. But the position of the cubicles against the window and how Miss. Hu was completely immersed in her work made it easier. When you put in such high concentration at something, the boundary to identify or not identify something becomes a little blur. The lighting and the coat made it sure that she wouldn't really notice him gone."

Hu Linglu heaved sharply. "That is why you came wearing a coat today! I have never seen you in a coat before."

Zhang Feiyu thought back to it too and agreed with her. He was so anxious about the conversation with Kong Chuanli that he hadn't properly looked at anybody today.

Zou Haoran stiffened. "Th-That's not true! She would have at least heard me moving the chair, right?"

"If you wheel the chair real slow, it's possible to not make a sound. That's what I did."