Private Prince

From Utopian Dream:
Sakuragawa Miyako is a graduate student at Eito University against the wishes of her family. She finds out that the prince of Istria is studying abroad and is at Eito University. She wants to get close to him only in the hopes of finishing her thesis on his great grandmother, Queen Ritsuko–but he has other ideas!?
From Aerandria Scans:
His highness the prince of Estolia Wilfred became an exchange student in Eito University. His noble appearance and gentleman’s manners quickly filled the campus with hysterical women’s voices. Miyako also studies at that university and for her master’s thesis, she is determined to interview the prince about his great-grandmother. But when she approaches him about it, she suddenly discovers “the dark side” of his character…?!