Mariette, utterly exhausted from being at the mercy of a love she had known since childhood, is betrayed by her trusted fiancé, Ryuchite, and drinks the 【Witch's Secret Potion】 meant to make her forget her romantic feelings.

Although Mariette's engagement is annulled and she starts a new chapter, she is called back before her former fiancés on the suspicion that she might possess the 【Key】 passed down exclusively to queens for generations.

It seems she has forgotten the Key's existence along with her romantic feelings, and now, to recall its whereabouts, she must fall in love with her former fiancés once more.

※This is the full-length version.

※The premise differs from the short story version.