Kozue-chan no Koukan Nikki
こずえちゃんの交換日記
Hayami Chiho struggles with sending text messages after a negative experience six months earlier. Her hesitation and overthinking lead to delays in responding, which often result in confusion and unintended hurt. A classmate, Kozue-kun, proposes using an exchange diary to help her practice. The story explores whether Chiho can manage her anxieties through this method.