When the first prince Eins shuts himself in his room for days, Count Rosenberg finally resolves to accept the help and care of Heine and the other four princelings. But when they finally burst into Eins's room, the eldest brother is nowhere to be found...!

Prince Licht's love of his part-time job at the cafe is no secret. (Well, his identity is a secret...and that he even has the job is kind of a secret... Anyhoo......) When he's given an opportunity to brew up his own special coffee blend, does he have the stuff to take his budding enthusiasm to the next level?

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?

Thanks to Heine's teachings, the four princes have overcome a lot and matured into leaders in their own right-so the time has come for King Viktor to officially choose the heir to the throne. But in order to do so, he gives his sons one last task: to give a speech in front of the entire kingdom. Having never given one before, the four younger princelings are at a severe disadvantage...but luckily, they've got Heine to whip them into shape! The royal comedy about princes and their tutor comes to a majestic end in this final volume!

After an old photo of Professor Heine reveals a darker past than the princes could've ever imagined, Heine decides to explain the true story of what happened on that fateful night... Shaken by this knowledge, will the princelings be able to accept Heine or have they lost trust in him for good?

Prince Licht's fascination with coffee should come as no surprise given his affinity for his part-time job at the cafe, but when Leonhard suggests the bitter drink should be banned from the kingdom, can Lichie help him develop an appreciation...?

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...

Heine's efforts to shape the princelings into worthy successors to the throne continues, but it seems that Bruno in particular is struggling with a bit of a crisis of conscience when it comes to his future. Can he live up to Heine's standards to remain his 'apprentice'? More importantly, does he have the courage to carve out his own path?

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...

Some unexpected guests to the royal palace have the princes on their toes! Between acting as gracious hosts and testing their language skills, what additional lessons will the prospective heirs to the throne learn from their visitors?

Prince Licht once again finds himself caught between his role as a prince and his desire to have some fun in his life. How will he react when the count offers his assistance?

Accepting the post of Royal Tutor at the court of the king of Grannzreich, Heine Wittgenstein is a little professor with a big job ahead! 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!

At long last, the eldest prince of Granzreich has returned to the kingdom. It goes without saying there's a royal reunion to be had, and with a family full of unique personalities, it's bound to be memorable in one way or another...

Dismayed by the disturbance at Cafe Mitter Meyer, Prince Licht is keen to investigate--but it seems his urgency may throw him under his coworker's suspicions... Licht faces a choice: hide or be revealed? Hinder or help? What lesson can Heine pull from Licht's turmoil?

When Leonhard receives an invitation to the Kingdom of Fonseine from Prince Claude, the princes set off on their first big trip together. Will this trip give Leonhard the opportunity to put his new language skills to some good use, or will he sink to his usual aggression?