Interview with a Prince IV is the fifth chapter of the Oushitsu Kyoushi Heine manga.
Heine sets off to find the last prince, Kai, who according to his notes is dangerous and hostile, and got kicked out of the military academy because of a violent outburst. He manages to stumble upon the napping prince in the courtyard thanks to the royal pet dog, Shadow. Kai wakes up and starts to pet Shadow, while greeting Heine in a cordial manner. Heine soon learns that Kai is actually a gentle, timid young man who often gives others the impression he's scary because of his sharp eyes and lack of talkativeness. Kai takes a liking to Heine because he likes cute things, and tells him that he's the first teacher to ever talk to him. As Heine leaves, he decides to make his own judgement on his pupils instead of relying on third-party sources, and pursues his duties with a renewed vigor.