Sisters Kozue and Hina lost their parents at a young age and have been relying on each other ever since. Hina has always been gentle and caring, deeply attached to her older sister, and the two have remained extremely close. As she grows older, however, Hina begins to realize she is romantically attracted to women. Meanwhile, Kozue, heartbroken from a past relationship, has given up on men and has found herself drawn to women as well—but lacks the courage to confess her feelings. As their emotional bond deepens, a tender yet bittersweet story unfolds, exploring how their relationship evolves into something more.