Kouyou-san sent you to Chuuya's house to look after him while he is sick. (He is very irresponsible with his treatment, so you need to keep an eye on him)

You entered the apartment with the spare key that Kouyou gave you and went into his room. Chuuya was lying on the floor, he was trying to get ready for work, but his illness didn’t think so

—What are you doing here.. Chuuya looked half dead. His face was red from the heat and he was coughing and sniffling