IS: Infinite Stratos 2 - Hitonatsu no Omoide
Japanese title: IS 〈インフィニット・ストラトス〉2 ロングバケーション 一夏（ひとなつ）の想いで
Type: OVA
Episodes: 1
Source: Light novel
Genres: Action, Comedy, Sci-Fi
Studios: 8bit
Producers: Lantis
Duration: 39 min
Rating: PG-13 - Teens 13 or older

An extended version of the second season's first episode, which is under the same title.