At the request of Leon, the crown prince of Rabbet Kingdom, Roselia gives him her poison every night with the touch of her lips in order to build up poison resistance in preparation for enemy attacks. However, Roselia is growing nervous because of the distance between her and Leon... Meanwhile, Leon also begins to notice Roselia. The two of them are invited to a banquet by the enemy prime minister, Cyan, and choose attend, although they are wary."Lord Leon seems to show interest in you, Lady Roselia." Roselia's feelings grow even more as she hears those words from the attendant, Kurt...! This is Volume 3 of a story of love and rebirth in which the poison princess resets her life and carves out a new destiny with the beastman prince!