An Yunhuai hadn't brought his water bottle with him, and wasn't able to drink water all the way until the break after the second class.
He normally wouldn't forget something like bringing a water bottle, but perhaps because it had been such a long time since he last came to school, he was a bit excited. He had lain in bed for a long time last night before falling asleep, and this morning, he overslept. In his rush, he forgot.
He even forgot to take his medicine.
Missing one dose of his medication wasn't a big deal.
His condition was quite stable now.
Even though he was thirsty, An Yunhuai didn't have the habit of drinking from someone else's bottle. Boys and girls would occasionally drink from each other's bottles if they were the same gender, but An Yunhuai had never drunk from someone else's and wasn't accustomed to it.
He'd rather be thirsty than drink from another's.