Harem Anime
High School DxD: Fantasy Jiggles Unleashed
A series of 3-5 minute specials that were bundled with the HighSchool DxD DVD and Blu-rays. They are a stand alone set of episodes that are not a part of any story line in particular.
#1: Going Sunbathing! - The Occult Research Club goes on a beach outing.
#2: Issei's Private Training! - Issei is being given lessons in magic by Akeno.
#3: A Little Bold, Koneko-Chan... Nyan! - Koneko accidentally has her personality reversed magically, making her incredibly sexually active and reversing her sexual preference.
#4: The Untold Story of The Dress Break's Birth! - A few flashbacks of how Issei first found out and eventually perfected his special move, Dress Break.
#5: Making Udon! - As part of a penalty for losing a bet, Sona and Tsubaki make udon for the Occult Research Club but the udon comes to life in a peculiar way...
#6: Asia Transforms! - Asia wants to prove she is just as bad as any demon by using ideas found in Issei's magazines, going as far as dressing up like a harlot and seducing him.
(Source: Wikipedia)
Princess Lover!
Arima Teppei lost his parents in a traffic accident. His grandfather Isshin adopted him by force and ordered him to succeed the head of Arima Group Corporation. At Shuuhou Gakuen, a high school only for wealthy students, Teppei's new life as a celebrity starts.
Conception
On his high school graduation day, Itsuki's cousin, Mahiru, tells him that she's pregnant. Just then, a gate of light emerges and transports the two into the world of Granvania. In this land, "Impurities" have been causing a disturbance to the Stars, ultimately plunging Granvania into chaos and disorder. And Itsuki, now revealed to be one who is fated to meet with the "Star Maidens," is seen as Granvania's last hope and was thus given the task to produce "Star Children" and combat the "impurities." And unless the task is complete, Itsuki may never be able to return home.
(Source: Wikipedia, edited)
Ladies versus Butlers!
Hino Akiharu lost his parents when he was small and was adopted into his uncle's family. He didn't want to be a burden on his uncle's family and decides to enter a free boarding school as a butler, Hakureiryou high school. However, his delinquent boy-like appearance frightens the girls, who make up the majority of the students. Unable to get along with the classmates, Akiharu meets his childhood crush Saikyou Tomomi.
(Source: MAL)
Ryuugajou Nanana no Maizoukin
"I'm going to build a place where young people can challenge to reach any of their dreams!"
The 7 genius students, known as the GREAT 7, launched a project to construct an artificial island called Nanae Island to realize their leader, Nanana Ryugajo's peculiar idea.
12 years later, with a total population of 100,000 people with as much as 80% of those inhabitants being students, Nanae Island has successfully become prosperous as a special student zone. One of the island's newest residents was Jugo Yama -- a high school student who had just transferred to the island after being disowned by his father. One day, Jugo finds in his own apartment the earth-bound spirit of the late Nanana Ryugajo, who was murdered by someone 10 years ago! Jugo's plan of living alone was suddenly thwarted by this strange roommate.
The original novel "Nanana's Buried Treasure" won the Grand Prize of the 13th Entertainment Awards, which was the first Grand Prize in eight years. This anime series features the adventures and challenges of Jugo Yama as he searches through the historic ruins of Nanae Island for the great treasures, A.K.A "Nanana's Collection," along with the extraordinary characters he meets along the way. The mysterious puzzles of the ruins! The excitement of the treasure hunt! The strategic maneuvers and battles of thought and reason between the characters! Nanana's Buried Treasure is an adventure you won't want to miss!
(Source: Aniplex USA)
Ryuuou no Oshigoto!
Shogi, a Japanese game similar to chess, is one of the most popular board games in the country, played by everyone from children to the elderly. Some players are talented enough to take the game to a professional level. The title of Ryuuou, meaning "the dragon king," is only awarded to the person who reaches the pinnacle of competitive shogi.
Yaichi Kuzuryuu has just become the youngest Ryuuou after winning the grand championship. However, the shogi community is unwelcoming to his victory, some even calling him the worst Ryuuou in history. Moreover, he forgets about the agreement he made with Ai Hinatsuru, a little girl he promised to coach if he won. After she shows up at his doorstep, he reluctantly agrees to uphold his promise and makes Ai his disciple.
Together, they aim to improve and exceed the limits of their shogi prowess: Ai, to unlock her hidden talents; Yaichi, to prove to the world that he deserves his accomplishments.
(Source: MAL Rewrite)
Vampire Knight
Cross Academy is an elite boarding school with two separate, isolated classes: the Day Class and the Night Class. On the surface, Yuuki Cross and Zero Kiryuu are prefects of the academy, and attempt to keep order between the students as classes rotate in the evenings. As the night class is full of utterly gorgeous elites, this can sometimes prove to be a bit difficult. It is completely necessary, however, as those "elites" are actually vampires. Yuuki and Zero act as guardians, protecting the secrets of the Night Class and the safety of the ignorant day class.
As the adopted daughter of the academy's chairman, Yuuki takes her job with a serious and energetic attitude. It also allows her to interact with her secret crush and savior, the night class' dorm president, Kaname Kuran. Zero, on the other hand, has a deep-rooted hatred against vampires, and at times, does not hesitate to kill.
Can vampires and humans co-exist, even in the strict setup of the Cross Academy? Only time will tell.
(Source: MAL Rewrite)
Sora no Otoshimono: Forte
Sakurai Tomoki has settled into his life with the two angeloids, Ikaros and Nymph, and is enjoying himself immensely. However, he keeps having weird dreams and asks all of his friends to help him investigate the cause.
Nymph conjures up a device that enables people, but not angeloids, to enter other people's dreams. The device malfunctions at first but eventually they get to what was supposed to be Tomoki's dream but discover that something is very wrong with it.
Later, a meteor comes crashing down from the skies at the site of the large cherry blossom tree where Tomoki first discovered Ikaros. An extremely well endowed blonde angeloid with a huge sword emerges from the meteor and sets off in search of Tomoki!
(Source: AniList.co)
Strike the Blood III
The third season of Strike the Blood.
It was announced at a Dengeki Game Festival stage event that the Strike the Blood light novel series will get a third OVA release. It will cover until the end of Seisen-hen.
(Source: MAL news)
Okusama ga Seitokaichou!+!
The second season of Okusama ga Seitokaichou!
Some time has passed since student council president Ui Wakana and vice president Hayato Izumi got married due to the agreement their parents made. While they still try to avoid unnecessary attention by keeping their unusual relationship a secret from the public, the two frequently misunderstand each other's desires. However, as Ui and Hayato continue working in the school's student council and spending time together at home, the peculiar couple gradually grows closer.
(Source: MAL Rewrite)
Sekirei: Pure Engagement
The battle to find the supreme Sekirei continues. Still some of the fighters and their masters refuse to participate in the battle since losing it means to lose the Sekirei forever, and many of them actually care about their partners, while others just use them as tools. A storm is rising on the horizon, a bigger threat approaches the city and it's about to bring pain and suffering to those who love and care for their Sekireis.
(Source: Anime News Network)