AniList score 59%

Synopsis
An original anime DVD bundled with a limited edition of saxyun's 4th Yurumates manga volume. The bundled DVD contained the opening animation sequence for the television anime series and its first episode, as well as two unaired episodes. The limited edition also included an exclusive booklet.
(Source: Anime News Network)
Synopsis and metadata via AniList.
Characters

Yurume Aida
Main

Kumi Tanaka
Main

Sae Kawano
Main

Matsukichi
Main

Sae no imouto
Main
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AniList score 59%