Six short "Special Broadcasts" (omake) were produced and aired after selected episodes. They lasted around five minutes and followed the general style of the main anime, although the characters are drawn as chibis.
(Source: Wikipedia)
Ayaka KurusugawaMain
Kotone HimekawaMain
Hiroyuki FujitaMain
Akari KamigishiSupporting
Tomoko HoshinaSupporting
Shiho NagaokaSupporting
Serika KurusugawaSupporting
Lemmy MiyauchiSupporting
Aoi MatsubaraSupporting
Masashi SatoSupporting
SerioSupporting
Rio HinayamaSupportingAniList supplies these relationships. Prequels and sequels connect the story; they do not establish a complete viewing order. Adaptations and source manga are separate works, without an assumed Episode-to-Chapter match.
