Kaede Domyoji, mother of Tsukasa and Tsubaki, is an influential businesswoman who owns international hotels and enterprises. She resides primarily in New York and prioritizes her professional obligations above personal relationships. Despite being wealthy, she remains emotionally distant from those around her, adhering strictly to her plans without regard for others' emotions. Annually, Kaede returns to Japan to commemorate Tsukasa's birthday, the eldest son in the family and heir to their fortune.