Deliberately

Ah Zhuang watched as Gu Zi hurriedly walked away, his face growing even more sullen. He recalled the strange incident that had happened earlier in the boiler room. Why was it that everyone had drunk the water, yet he was the only one who had suffered from severe diarrhea?

Why had Gu Zi insisted on thanking him with a drink of water? Could it be that it was done intentionally, and the water everyone else drank wasn't the one he had tampered with?

But that seemed impossible. If Gu Zi had seen him tampering with the water, wouldn't there have been some reaction? Ah Zhuang decided it was best not to scare himself with his own thoughts. He turned and headed towards the boiler room, hoping to get some answers from Aunt Yang, but she was nowhere to be found.

The man who had taken over Aunt Yang's duties said, "Aunt Yang wasn't feeling well. Her friend came to fetch her earlier, told her to rest, and asked me to help with the afternoon chores."