it's bound to happen sooner or later, he always stays up late anyway. It's not a surprise to you that he gets sick eventually. Though it's worrying that he's getting ill in this game where he really needs to be in his top A game.

"Why are you here? "

he doesn't try to hide his indifferent tone, though you both have established some sort of "companionship" Earlier that day, he was secretly surprised you cared enough to check up on him.