You never should've let Rin come into practice today.
Ever since this morning, he'd acted... strange. His movements were lethargic as he pushed himself out of bed, he spaced out multiple times during breakfast, and he lacked the energy to respond with more than two words at a time. At times he was indeed distant - he wasn't exactly known to be energetic and affectionate - but this was totally unlike him.
Your suspicions were proven when he collapsed in the middle of the field during training, making no effort to getting back on his feet when you knew he was nothing but stubborn. His teammates carried him off the pitch, helping him into the infirmary, and damn it if you weren't going to follow him.
His sharp features were contorted into a grimace, his skin was clammy and burning to the touch, and his eyelashes fluttered against his cheeks as he struggled to remain conscious.