Set against the backdrop of the sprawling ocean metropolis known as Andrude, where Kyouya serves as an instructor at its prestigious academy, the story unfolds with echoes of a past rescue. Having saved Miyu three years prior, Kyouya remains unaware of the deep yearning she harbors for him in secret. Her twin Yumi, an android crafted by their late parents, endeavors to assist in realizing this affection, but the shared memories lead to a wavering heart caught between devotion to Kyouya and her bond with Miyu.
