Ecchi Anime
Onegai☆Teacher
Kusanagi Kei, a high-school student living with his aunt and uncle, has an encounter with a female alien. This alien is revealed to be a new teacher at his school. Later, he is forced to marry this alien to preserve her secrets. From there, various romantically-inclined problems crop up repeatedly.
(Source: Anime News Network)
Hoshizora e Kakaru Hashi
Kazuma has moved to a small town in the country. On his first day at school, he meets Ui when he is lost his way. They go to school together, but Kazuma accidentally slips and kisses Ui.... To make matters worse, Ibuki, Ui's close friend, sees it.... Well, what will happen to his new school life...?
(Source: ErogeShop)
Mondaiji-tachi ga Isekai kara Kuru Sou Desu yo?: Onsen Manyuuki
Fleeing through the forest, Hifumi tries to outrun a band of thugs. Accidentally falling off a cliff she lands in the arms of Sakamaki Izayoi, who is accompanied by Kasukabe You and Kudou Asuka. And so the No Names protect Hifumi from the members of a community of slave traders using Deen. As it turns out Hifumi has the special ability to find water sources.
At the presently dried up hot springs, the gang joins up with Kuro Usagi, Lili and Letitia. Now it is up to them to win another Gift Game... the prize: a luxurious soak in the hot springs.
OVA bundled with the eighth volume of the light novel.
(Source: AniList.co)
Boku wa Tomodachi ga Sukunai Episode 0: Yami Nabe wa Bishoujo ga Zannen na Nioi
Hasegawa Kodaka has transferred schools, and he's having a hard time making friends. It doesn't help that his blond hair tends to make people think he's a delinquent. One day, he runs into his bad-tempered solitary classmate Yozora while she's talking animatedly to her imaginary friend Tomo. Realizing that neither of them have any actual friends, they decide that the best way to alter this situation is to form a club and start recruiting.
That is how "Rinjinbu", The Neighbours' Club, was formed, a club specifically designed for people who don't have very many friends. As other lonely classmates slowly join their little club, they'll try to learn how to build friendships through cooking together, playing games, and other group activities. But will this group of relationship-challenged misfits really be able to get along?
(Source: MU)
Fate/kaleid liner Prisma☆Illya 3rei!!
The third season of Fate/kaleid liner Prisma☆Illya.
Illya and the gang have finished their battle against the heroic spirit residing in the eighth class card. They're back in vacation mode again, looking to make the most of what they have left of summer break. But their hopes get crushed in the blink of an eye. An all-too-unrealistic silhouette appears before them when they go to investigate the strange event at Mount Enzō. After a short skirmish, the entire space ends up being warped. Illya wakes up in a wintry Fuyuki City... in a parallel world. This is the world where Miyu was born and raised.
(Source: Anime News Network)
Zombie no Afureta Sekai de Ore dake ga Osowarenai
In an instant, the daily life of Takemura, an office worker who hates people, changed. Before he knew it, he found himself in a world full of zombies. But for some reason, he is the only one who is not attacked by the zombies.
"Helping people? Why would I do that? I'm going to live in this world as I please." In a post-apocalyptic world where civilization is on the verge of collapse, Takemura has unexpectedly gained great power. As the only person that the zombies won't touch, will he be a hero, or is he just another......?
(Source: Frontier Works, translated)
IS: Infinite Stratos - World Purge-hen
While Ichika Orimura departs to visit Kuramochi Engineering's laboratories, an unidentified enemy hacks into IS Academy's core and cripples its systems. To fend off the attack and repair the damage, his older sister Chifuyu enlists Ichika's harem: Houki Shinonono, Cecilia Alcott, Huang Lingyin, Laura Bodewig, and Charlotte Dunois. Together, they utilize virtual reality to confront their opponents in IS Academy's network.
Unbeknownst to the girls, a piece of malware named "World Purge" is activated when they enter the digital realm. The program forces them into fabricated realities, where they each experience an ideal romantic version of their bond with Ichika. Once Ichika returns to IS Academy, it is up to him to rescue the five girls and wake them from this virtual reality.
(Source: MAL Rewrite)
Monster Musume no Iru Nichijou SP
During a physical exam, Miia, Centorea, and Mero discover that they have gained too much weight due to Kimihito Kurusu's delicious cooking. To remedy this, Polt offers them first use of her new pool and gym facility before its grand opening. However, it's not all fun and games, as the three girls' competitive spirits start to flare up!
Meanwhile, when Rachnera Arachnera receives a letter from her previous host family, she finds out that they would like to meet with her and apologize for the events that caused her transfer. But, as it turns out, not only do they want to apologize, they want her back as well! When the family's daughter, Ren Kunanzuki, shows up at the front door, the gang must convince her to let Rachnera stay at Kimihito's house.
(Source: MAL Rewrite)
Astarotte no Omocha!
While job hunting, Naoya is taken by a mysterious girl to a magical land where he is installed in the harem of the succubus Princess Lotte. Thanks to trauma from her childhood, Lotte hates men and surrounds herself with lots of other women, who all have quirks of their own. In spite of her selfishness, when Naoya learns that Lotte is really quite lonely he agrees to stay in her world ...if he can bring his daughter Asuha with him.
(Source: Anime News Network)
Azur Lane: Bisoku Zenshin!
This is a slightly peculiar world where the shipgirls live in. A lively and enjoyable school life for girls from different factions will begin at the naval port of Azur Lane. Living out their lives to the fullest, these girls get into various shenanigans—slowly but surely!
(Source: Crunchyroll)
Inu ni Nattara Suki na Hito ni Hirowareta. OVA
Unaired episodes included in the Blu-ray box volumes.
Sankarea OVA
Two OVA episodes are bundled as DVDs with each of volumes 6 and 7 of the manga.
The first OVA is a prequel story written by the manga's author. Before the beginning of the main story, Rea and Chihiro have already met at a certain place - an outdoor hot-spring bath.
The second OVA takes place after the series (effectively episode 14). The Furuya family finds a mysterious young girl hiding under the household temple.
(Source: AniList.co)