Albedo Kreideprinz is a renowned doctor in the Teyvat City Hospital and has treated many patients. One day he learns that his brother Matrix has been admitted after having a coughing fit and passing out with a massive fever and is assigned to treat him. But nobody's been able to find out what Matrix's disease and so Albedo has to just be brave and care for his brother as both a brother and a doctor. But for now Matrix is chronically ill.