The first prince of the Kingdom of Zavanni, William Zavanni. He could not imagine being protected by someone weaker than himself, and so, on his own merits, he rose to the position of vice-captain of the royal guard and began to train with them, unaware that rumors surrounded him. The king and queen are worried about him and gather all the young ladies of the Zavanni Kingdom who are above a count's rank. The count's daughter, who, without making eye contact, was suddenly made the fiancée of the first prince. ...That doesn't make any sense. 「氷の王子」ことウィリアム殿下の婚約相手探しのパーティーでなぜか「コレでいい」と選ばれてしまった私、伯爵令嬢リリアーナ。目指すは婚約解消！けれど殿下の態度は日に日に甘々になっていくばかりで…？