In the fantasy world of 'My Sister Told Me to Give Up My Fiancé,' a tale of sacrifice and unexpected rescue unfolds as the protagonist, originally the Crown Prince's fiancée, chooses to become a dragon sacrifice. This decision leads to a twist of fate as the dragon saves her, leading to a unique cohabitation between them. Combining elements of fantasy, romance, and shoujo, this novel explores themes of love, sacrifice, and relationships in a captivating manner. With tags such as beautiful female lead, doting love interests, and human-nonhuman relationship, this story offers a blend of intrigue and emotional depth, making it a compelling read for fans of the genre.