Roselia Oukoku Monogatari: Himegimi to Yasashii Ansatsusha

At the age of 17, Roselia is crowned Queen of the Bara Kingdom, but she is actually an ordinary girl with natural dispositions. At a festival, she meets Hernan, a man from another country, and is fascinated by him. But he is an assassin sent from a neighboring country to kill her...! (Source: Beaglee, translated)

Roselia's husband is to be chosen at a ball, and suitors from all over the world, princes, have gathered! But Roselia's love interest is a former assassin. Will this love be fulfilled...? (Source: Oozorashuuppan, translated) *Note: Also includes Wagamama Hime no Hatsukoi (わがまま姫の初恋).*