الحلقة 1: تنضم العازفة الغيتار الخجولة هيتوري غوتو إلى فرقة كيسوكو لأداء مهام العزف المساعد ليوم واحد فقط.

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Hitori Gotou is a girl who is extremely shy and gloomy. She longed for band activities and started playing the guitar, but she couldn't make friends and practiced alone every day. One day, Nijika Ijichi, who plays the drum in a band called "Kessoku Band", asks her to play the support guitar for just one day. (Source: Bocchi the Rock! Fandom-Wiki)