Ecchi Anime
Kyochuu Rettou (Movie)
After an airplane crash during a school trip, Oribe Mutsumi and her classmates were stranded on a seemingly deserted island. Mutsumi found the other survivors, and used her wilderness knowledge to help them. She expects that they will be rescued in about three days, which doesn't seem so long to endure. However, she didn't account for the fact that the island is populated with gigantic killer insects. Her knowledge of butterflies, wasps, and more may be the only thing that will help any of her classmates survive to be rescued.
(Source: MangaHelpers)
Keijo!!!!!!!! Specials
Amagami SS+ Plus Specials
Short extras of the anime included in each of the six Blu-ray volumes of Amagami SS+.
Isuca: Gokuraku
An OVA bundled with the 7th volume of the manga. Includes a beach episode.
Astarotte no Omocha! EX
The OVA Astaroette no Omocha is a three part short story series. In the first story, Lotte and Asuha find themselves searching for details about their school project. In the second bit, is the backstory to how Zelda came to be Lotte's bodyguard. The final of the three, is a flashback of how the queen met Naoya and how they conceived Asuha ten years prior to the events in the anime.
(Source: Anime News Network)
School Days
The story is about a love triangle between the male protagonist Makoto, and the two heroines Kotonoha and Sekai. Makoto develops a love interest in Kotonoha, a girl in the same year but different class. Although they both take the same train to school, she is unaware of his existence. His classmate, Sekai, manages to put the two together despite holding strong feelings towards Makoto.
(Source: Anime News Network)
Maken-Ki! Two Specials
Onigiri
The MMORPG Onigiri thrusts its players into mystical Japan, a land filled with mythical creatures of Japanese legend. Starting as a lone Oni, players fight against the malevolent influence of the Kamikui as their miasma spreads over the land. 8 NPCS, each with their own distinct personality and skills, ally themselves with the player to help build a legend, and quell the evil that has arisen. As you grow stronger together, so do the bonds binding you to each other.
(Source: Anime News Network)
30-sai no Hoken Taiiku
Based on Mitsuba and Ichijinsha's 30-sai no Hoken Taiiku (Health and Physical Education for 30-Year-Olds) guidebook. The guide is aimed at men in their 30s who have not experienced romance or sex with women yet.
Imagawa Hayao is a 30-year-old virgin bachelor. One day, a cupid descends from heaven with the express purpose of forcing him to graduate from virginity. Thus unfolds a pure love story between a 30-year-old bachelor and a 30-year-old bachelorette.
(Source: AniDB)
School Days: Valentine Days
OVA that came with the PlayStation 2 game "School Days L×H"
Makoto, Sekai, Kotonoha, and many other classmates all go to a hot springs hotel to relax, where they discuss what their plans are for the upcoming Valentine's Day. When the day actually comes, half a dozen girls fight over who gets to give chocolate to Makoto.
(Source: Anime News Network)
Nogizaka Haruka no Himitsu: Purezza
Haruka's manga and anime hobby is still concealed by her dear friend Yuuto, but Yuuto's other female friend starts to feel affection and attraction towards him, so a feelings war begins among their circle of friends. Meanwhile Yuuto tries to make Haruka happy doing what she likes the most: drawing manga, watching anime, and attending special anime events.
(Source: Anime News Network)
Macademi Wasshoi!
Magician's Academy revolves around Takuto Hasegawa, who attends a magic academy that is not marked on any map. During a summoning spell exam, he accidentally creates a girl named Tanarot, who happens to hold enough magical power to destroy his country, but fortunately Tanarot professes undying loyalty to her "creator."
(Source: Anime News Network)
Fate/kaleid liner Prisma☆Illya 3rei!! Specials
Mangaka-san to Assistant-san to THE ANIMATION: Mini OVA
SoniAni: Super Sonico The Animation
Super Sonico is the mascot girl of the "Nitro Super Sonic" events held by Nitroplus. In her back story, she is already a photoshoot model, game character, and a musician, even as she studies as a college student.
Mahou Sensei Negima! Shiroki Tsubasa Ala Alba
OVA episodes that are bundled with the limited edition of the manga volumes 23-25. First episode to cover chapters 176 and 177 of the manga. Second episode to cover chapters 178-180. And third episode to cover chapters 182 and 183.
Henkei Shoujo
When a gust of wind blows away a young woman's hat, a high school girl sprints past her and leaps into the air to retrieve it. However, this is no ordinary girl. Feeling the hat barely escape her grasp, the girl morphs her body into a fighter jet, blasting off into the distance with a burst of speed to catch it. This encounter is the young woman's unexpected introduction to the Henkei Shoujo: seemingly normal girls with incredible transformation powers who live among humans.
(Source: MAL Rewrite)