Masozi is, presumably, spending the afternoon safely ensconced in his room and studying Mandarin. The first hint of something wrong is when he fails to appear at the Shanghai table for dinner, even well after all the other freshman have made it over.
Masozi's enthusiasm for trying to stand up is well below zero, but he's willing to make the attempt. Well. Starting with just sitting up, at which point he's very lightheaded, and puts his head down on his knees again. "- Don't know if I can. I can - lie on the floor?"
"I'm hoping to keep him on the anti-nausea spell but it'll be good for after dinner."
He leaves to take the sheets to the minion who does laundry and to find a bucket of some kind.
"So we don't know what you took, if it's poisoning, which makes the treatment harder. I'm going to give you the charcoal, it tastes awful but it's a good broad-spectrum anti-poison potion. If it's food poisoning it should clear up on its own in a day or so. Drink plenty of the water."
"Mmmkay." He is now very stuck on the floor and is maybe just going to stay there until Wen Qing volunteers to put in the effort required to change this situation. "Where's Lan Xichen?" he adds, tentatively, after a moment. "Can he - I want..." Actually make this is an unreasonable thing to ask for and he shouldn't? He trails off.
"You're going to need someone to watch you to see if you get worse and make sure you have water, I don't see any reason why Lan Xichen can't be that person."
"You'll be alone overnight but someone-- Lan Xichen, if you like-- will come sit with you the first thing in the morning."
"Okay." It's the first week of school; he probably won't be eaten by a mal in the middle of the night, and if Lan Xichen is worried about it he can figure out extra wards.
He closes his eyes and drifts, still too generally uncomfortable to actually manage sleep, but a lot less miserable than before.
But the floor is a perfectly fine place to be flopped fine, he will accept Wen Qing's help to drag himself back onto the bed, and then burrow under his blanket and wish he had a second blanket or, better yet, snuggles from Lan Xichen. At which point he has to remind himself that almost certainly Lan Xichen is not going to want to snuggle him when he's sick, he probably smells terrible again.
Wei Wuxian is also a fairly comforting person to have there, even if he's not Lan Xichen.
Masozi tries to sit up without unblanketing any part of himself below the chin. "Why, is something else happening?"
"Boston is full of idiots and that's all I have to say about it. Drink, I went through hell for this."
Whatever, probably it's not an emergency that Masozi needs to worry about right now, then? He accepts the water and sips it carefully; his stomach gurgles uneasily about this but he's not exactly nauseated and the sip of water stays down.
He tries to find a more comfortable half-propped-up position where he doesn't have to support himself, but this is hard to figure out when he only has one somewhat sad and deflated pillow.
"Excellent. Go get Masozi some the pillows. --Masozi, you have to drink this entire potion. I'm so sorry, it tastes disgusting, but if you were poisoned it will keep you alive."
"Okay."
He will try to drink all of the disgusting potion! It's incredibly disgusting! Despite the anti-nausea spell, it keeps making him gag, and he's uncomfortably aware that his stomach has contents again, and does not exactly approve of this right now.
Eventually he's drunk all of the horrible potion! Unfortunately he gets to continue to taste the horribleness every time he burps!
....Does he, in addition to drinking it, also have to not throw it up again. Is there a minimum time limit he has to manage to keep it down or something.
"Do you think you can keep it down or should I go for the heavier-duty anti-nausea spell?"
"Maybe? I - I don't know -" He tries to reach the water jug again, maybe getting some of the horrible taste out of his mouth will help. "S'just - a lot of potion."
"It's up to you-- the other anti-nausea spell will last longer and you definitely won't throw up the potion, which is good because the longer it's in your system the more time it has to soak up the potion, but it tends to make people... loopy."