Kozue and her younger sister Hina lost their parents at a young age and have been supporting each other ever since. Hina has always loved her kind and caring older sister and they have been inseparable, but as she grew up, she gradually realized that her romantic interest was in women. Kozue, on the other hand, had experienced a major heartbreak and thought she was done with men, starting to notice women instead, but lacked the courage to act on it.
