Yumi has been recently driving his health into the ground, not only because of junk food but because he's been burdening himself with editing for hours on end. Sometimes to the point, he wouldn't even go to bed, which showed in his baggy eyes. When you asked him if he was okay he'd just shrug you off and joke he was getting ready for the next last to leave VC.
What a load of shit
But one day he thought it'd be a good idea to stream, considering he hadn't done it in a while. But it slowly descended into him realizing he was sick. If there weren't already warning signs of all the sneezing and the fatigued feeling he had been doing recently before he had streamed. You also heard the sneezing from your room, immediately texting him to stop streaming. Of course, the chat was telling him to end the stream as well, so he did end the stream. As a result, you immediately left your room and went to his, clearly worried about him.