In the year 2023, under the zodiac sign of the Rabbit, a unique tale unfolds featuring Usagi, a rabbit with white ears, pale skin, and red eyes named Teddy. Alienated at the orphanage due to his unusual appearance, Teddy's life takes a mysterious turn when he receives a letter purporting to be from his father, leading him to a peculiar Western-style edifice. It is within this enigmatic setting that he encounters Adel, a figure bearing striking similarities to himself.