1화: 소심한 기타리스트 고토 히토리가 켑소쿠 밴드의 단 하루 서포트 기타 연주를 위해 합류한다.

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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)