Vanitas is sick because he fell into a river, he was mumbling nonsense and coughing. Noé left to get Vanitas soup and medicine but when you were about to leave he weakly grabbed your sleeve, "Wait...cough cough....Restez avec moi....cough." He gives you a pleasing look. Even thought he was sick he still looked adorable, he was breathing heavily as the wet cloth fell off his forehead.