Princes Kai, Bruno, Leonhard, and Licht have been making great strides thanks to an excellent education from Heine, the royal tutor. Even so, with the return of Prince Eins, the eldest of the brothers and heir apparent to the crown, the wall they must climb in the struggle to become the most qualified candidate for the throne looks more colossal than ever. Can the four younger princes stand up to their biggest rival?

Rumors of Heine’s bloody connection to their father initially causes the princes’ trust in their tutor to waver. When the truth of how Heine came to be the royal tutor is fully brought to light, will the darkness of years past yield to a brighter future—together?

Sometimes kind, sometimes strict, Heine is prepared to employ any means necessary to draw forth his princeling students' potential. But seriously, what's a royal tutor got to do to enjoy a simple, quiet day off?? With royal engagements, reluctant readers, and secret lives seemingly everywhere he turns, Heine may need to up his game if this kingdom is to have any hope for the future at all!

Kai makes a friend at school and invites him over to the palace for tea. He asks his brothers for help in making conversation, but is that really such a good idea...? Then it's a battle of wits when Heine joins the princes (and princess!) for a game in the courtyard. After all the time they've now spent under his tutelage, can the students finally overcome the master?

Three of the princes have left home to study away from the castle and the guidance of Heine, but Leonhard remains, still under the strict observation of the Royal Tutor! Beneath the surface of everyday life lies the fierce will to fight for the right to the throne! With change all about them, now comes the time to grow and learn...

Accepting the post of royal tutor at the court of the king of Granzreich, Heine Wittgenstein is a little professor with a big job ahead of him! Each of the kingdom's four princes has a rather distinct personality. Does their diminutive new instructor have what it takes to lay down some learning? It's a comedy of educational proportions!

When the king returns to court, it's time for the princes to prove their mettle. But not everyone's been exactly keeping up with Heine's lessons... (Hint: It's the prince who only scored a one on his assessment test...and that was for signing his name!) Can Heine really whip these boys into shape well enough to rule a country?

The royal palace is bustling with successive arrivals, which is good news for lonely Leonhard! First, Beatrix comes seeking advice on how to cheer up her cuteness-starved fiancé. Then, young Prince Claude of Fonsein pays a diplomatic visit that pushes Leonhard's foreign-language skills to their limits. When Leonhard's dearest brother Bruno is next to arrive, everyone expects Leonhard to be elated...but the effusive prince is uncharacteristically reserved. Has their time apart soured the bonds of brotherly affection?!

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...

After failing the final exam for his dream job at the royal court, promising young sorcerer Allen wants nothing more than to retreat to a simple life in the countryside. Unfortunately for him, he can’t even afford the train fare! His only solution is to get a job, but his one lead is anything but modest—Duke Howard, one of the kingdom’s most powerful nobles, needs a private tutor for his daughter Tina. Despite her academic brilliance, Tina is incapable of casting even a single spell. To make matters worse, entrance exams for the prestigious Royal Academy are fast approaching, and magical aptitude is mandatory! Can Allen use his unique brand of spellcasting to help Tina overcome her magical impairment, a mystery that not even the kingdom’s finest sorcerers have been able to solve? And does her father, the duke, even want him to?