Amanchu!: The Story of the Promised Summer and New Memories

Four unaired OVA episodes released on the DVD volumes. Note: Known as episodes 8, 11, 13 and 16 on the home release.

Minami-ke OVA bundled with the 10th volume of the manga.

Summer has arrived at last, and with it comes the promise of summer break for the students of Lillian Girls’ Academy. Sachiko and Yumi retreat to the summer home of the Ogasawara family for a season of rest and relaxation, but their rosy trip soon sours when some old friends of Sachiko’s unexpectedly drop in. These wealthy snobs turn up their noses at Yumi and Sachiko’s relationship — and if Yumi isn’t careful, her blissful summer at Sachiko’s side could come to an abrupt and tearful end. (Source: Maiden Japan)

On the final day of summer vacation, Kokona Aoba is ready to spend some long-awaited time with her mother, but these plans are unfortunately canceled due to work. Opting to go outside instead, she takes a stroll down a familiar path—one where fond memories appear at every corner. Later, in the middle of autumn, Hinata Kuraue and Aoi Yukimura are looking through a scrapbook of their childhood. Snooping around in Aoi's room, Hinata finds that she has kept a strange acorn as a keepsake, but doesn't remember the reason why. As its discovery dwells on her, a wave of old memories comes forth, causing her to reminisce about a forgotten event from her childhood. From time spent with loved ones to promises from the past, Yama no Susume: Omoide Present follows the three girl

Four OVA episodes bundled with the 22nd, 23rd, 24th, and 25th volumes of the manga. The OAD project will adapt the "past arc," which spans from mid-volume 14 to volume 17 in the manga.

An unaired episode bundle with the tenth volume of the manga. Life in rural Asahigaoka moves at its own pace. Devoid of the pleasures and worries of a bustling metropolis, this small village might seem painfully dull at first glance. However, despite living this far from her hometown of Tokyo, Hotaru Ichijou manages to find a group of friends whom she can spend quality time with. No matter whether it's winter, spring, summer, or fall, they make full use of everything the nature around them has to offer.

OVAs of Seitokai Yakuindomo* which were either bundled with the limited editions of the manga volumes or as standalone OVAs.

Based on Barasui's manga series, Ichigo Mashimaro follows the life of Nobue Itou, her younger sister Chika, and her friends. The basic premise of the show can be summed up in "cute girls do cute things in cute ways", be it trying to quit smoking, going outside to play, celebrating a holiday, or doing school work. This OVA picks up where the series left off, continuing the adventures of your everyday life, only cuter. (Source: AniDB)