Sister?

'He knew...?' Stupefied, Andy Chang stared at him. 'How...?' Not many knew about this fact about her or rather, no one noticed that she never drank coffee. 

Yet, he did? But how? After all, although they worked in the same building, they rarely interacted with each other as they worked in the different departments. 

Moreover, Nico Zhuang was often by the big boss's side. Hence, their encounter was rare and mostly under formal circumstances. 

"You like sweets, don't you? This is yours." Unaware of the turmoil of feelings he had been unconsciously stirring in her, Nico Zhuang slid the slice of chocolate cake beside her hot choco before he glanced up. 

Upon seeing her daze front, he furrowed his brows. "Hmm? Is there something wrong?" He asked. 

Nico Zhuang was just acting as a kind gesture. After all, Andy Chang had shown sadness and disappointment earlier when they were on the front desk.