In the realm of an otome game, the antagonist Millene used to be a mischievous Japanese high school girl in her previous life. Meeting the charming 17-year-old Prince Rendor triggers a flood of memories, yet the 15-year-old Millene, known for her love of animals, finds herself captivated by him once more. Despite a relationship fraught with complications and misunderstandings, she endeavors to forge a joyful marriage in this enthralling and somewhat saccharine tale.