Manga by author Enjouji Maki - Status completed

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...?!

From Aerandria Scans: Men - they're the root of Takanashi Chiwa's problems, which is why she never had the time nor the opportunity to have a boyfriend in her entire life. A full-time office lady and a part-time hostess, she works night and day to pay off her dad's debt from his failed business. One night at her part-time job, a high-class customer has her fired. Then the next day, she's called in to see the president - whom she had never even seen before in the office - only to find out she's to marry him! But what kind of guy is Mamiya Hokuto anyway? Will he become one of Chiwa's problems, or will he save her from them? And will this marriage even last?!