For years Asato and Akane have shared a steady, affectionate life together, content with the quiet closeness they have built. Asato feels their days of simple happiness are settled and secure. That calm is interrupted when Akane’s childhood friend Kyousuke arrives unexpectedly and asks to stay with them for a short while. Moved by old loyalty, Akane persuades Asato to agree, unaware that the visit may bring unforeseen changes to their relationship.