From Blissful Sin:

On the outskirts of Tokyo, Toubuisazaki High School is known for its mottos of ?Yakuza are your friends!? and ?Seize the chief?s weakness!? Amidst these scary rumors is the king of the school, high school student Maki: a person with an abrasive personality, who thinks of his classmates as servants. It?s a mystery that Yoshifumi, the school nurse, loves him.
As Yoshifumi uses various tactics to draw Maki closer, how does Maki react? ?He likes it!

From Blissful Sin:

Ever since he was a child, Prince Uriel has always dreamed of searching for the lost city of Rowadis rumored to be buried somewhere deep in the desert. One day, he manages to sneak out of his country to join an excavation party in the hopes of learning more about his beloved Rowadis. However, the barren land turns out to be a dangerous place for the prince and he is captured by the savage Seldira clan. Follow the adventures of the young prince as he gets tangled up with the handsome leader of the Seldira and unlocks the mysteries of the desert.