Bocchi the Rock!: Gotou Futari no Onee-chan Kansatsu Nikki
English title: Bocchi the Rock!: Futari Gotou's Big Sister Observation Diary
Japanese title: ぼっち・ざ・ろっく！ ごとうふたりのおねえちゃんかんさつにっき
Type: TV Special
Episodes: 1
Source: 4-koma manga
Genres: Comedy
Studios: CloverWorks
Duration: 23 min
Rating: PG-13 - Teens 13 or older

This is a special program where we look back on the recent daily life of the main character, Hitori Gotou, from the observation of her younger sister, Futari Gotou.

(Source: Bocchi the Rock! Wiki)