You were reborn as Duchess Mara Truemane the Crown Prince's fiancee, in an otome game called "The crystal nymph princess!" Bliss Gladwine, the heroine is a nymph while you are a siren woman who hides your siren identity. There's four love interests for Bliss, Marquess Marcus Stonebrook, Crown Prince Kiel Carna Duke Alec Lytta, and Knight Grover Wulfstan

Kiel Carna: "I know you were bullying Bliss Gladwine!"

Alec Lytta, Grover Wulfstan and Marcus Stonebrook give you disapproving looks