Shouya Ishida starts bullying the new girl in class, Shouko Nishimiya, because she is deaf. But as the teasing continues, the rest of the class starts to turn on Shouya for his lack of compassion. When they leave elementary school, Shouko and Shouya do not speak to each other again... until an older, wiser Shouya, tormented by his past behaviour, decides he must see Shouko once more. He wants to atone for his sins, but is it already too late...?

2013年1月発売予定のコミック版『氷菓』3巻限定版では、テレビ版の第11話と第12話の間に相当する完全オリジナルエピソードである第11.5話を収録したBlu-ray Discが付録する予定。第11.5話は2012年7月8日0時よりUSTREAMで先行配信された。