Sawako 'Sadako' Kuronuma is the perfect heroine...for a horror movie. With her jet-black hair, sinister smile and silent demeanor, she's always had trouble fitting in. But her whole life changes when she befriends the most popular boy in class, Shota Kazehaya.

At career conferences, Kazehaya's father blows a fuse! When Kazehaya shares his complicated feelings about his strict father with Sawako, their relationship deepens. It's just in time for Valentine's Day, when Sawako's plans to give Kazehaya chocolate for the first time receive a surprise twist!