The Royal Tutor, Vol. 14

After Prince Eins's engagement is called off, Professor Heine and the four
princelings plan a get-well visit-only to be turned away at the gate by
Rosenberg. Though the boys remain racked with worry, life and lessons at the
palace must continue on. However, Bruno's discovery of an old photo in Heine's
room might upend everything the boys think they know about the mysterious
tutor...