With her jet-black hair, sinister smile and silent demeanor, Sawako "Sadako" Kuronuma always had trouble fitting in. But her whole life changes when she befriends the most popular boy in class, Shota Kazehaya. Can love trump her cursed life?

While their friends' romantic relationships deepen, Sawako feels Kazehaya pulling away. Will a big Christmas party bring the troubled couple back together, or will Kazehaya continue to hide his pain from the person who most wants to help him?