Bundled with the 11th, 12th, 13th and 24th volumes of the Yuragi-sou no Yuuna-san manga. The first episode will adapt the manga's 12th chapter. The last OVA will adapt the 99th chapter of the manga, "Noroware no Kogarashi," and the 141st chapter, "Giri Giri!? Onsen Happening."

Source: MyAnimeList