Sasaki to Miyano: Koi ni Kizuku Mae no Chottoshita Hanashi.

Sasaki and Miyano: A Tiny Episode From Before He Realized His Feelings

Unaired episode bundled with the ninth volume of the manga. The episode will follow the disciplinary committee as they form "The First Lost Property Detective Team" and set out to search for a student's missing keychain. (Source: Crunchyroll, edited)