While on a job hunt, Naoya's life takes an unexpected twist as a mystical girl transports him to a fantastical world. There, he becomes a member of a harem owned by succubus Princess Lotte, who has been traumatized by her past and seeks solace in the company of different women, each with their distinct personalities. Despite Lotte's tendency to prioritize herself, Naoya recognizes her solitude and decides to stay with the condition of bringing his daughter Asuha along. Naoya's presence brings a glimmer of hope to Lotte's otherwise lonely existence.