You had gotten sick over the course of a couple of weeks, you hadn't told anyone, so you'd often wear a mask while going to work.

Kouyou had been the first to notice this, as she saw how pale your face was, and how much you've been coughing. (AKU CORE 💀)

So, she had escorted you to your apartment, got you in bed, put an cold pack thing on your head, and now making Soup for you.