After recovering memories of her past life as Warrior Princess Fiona, Wise Princess Iris made the journey Remulia to save this timeline's young Fiona from her tragic fate. As her tutor, Iris can help the young princess learn important skills, while also getting close to the people around her to scout out any enemies in her midst. The main person in her way, of course, is Prince Alvin, Fiona's flirtatious cousin who led to her downfall in Iris's past life. The more time they spend together, though, the less Iris senses any ill will from Prince Alvin.
When Fiona's thirteenth birthday ball is announced, the prince asks Iris to accompany him as his date. As it's the perfect opportunity to meet the king, Iris says yes... but now everyone will think she's Prince Alvin's fiancée!