'For two girls to go walking, hearts bounding, is that strange?' Adachi, whose thoughts about Shimamura grow stronger every day, and Shimamura, who's not at all bothered by that girl's feelings. From an outside perspective, they seem like a close pair, but Adachi wants to close the gap between her and Shimamura even more. On that fateful White Christmas, what will they wish for? How will they move forward?