The Royal Tutor Vol. 11 (manga)

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?!