GuessAnime.

1. Ruri no Houseki

High schooler Ruri Tanigawa loves shiny things. She loves them so much that she heads into the mountains to search for crystals herself — where she unexpectedly meets Nagi Arato, a graduate student studying mineralogy. As the pair starts collecting minerals together, Ruri begins developing a genuine appreciation for science and the beauty of the natural world.

Ruri Rocks is finished and has 13 Episodes. It is also Known as: 瑠璃の宝石, Introduction to Mineralogy

2. Senki Zesshou Symphogear

Two years ago, a pair of idols, Tsubasa Kazanari and Kanade Amou, collectively known as ZweiWing, fought against an alien race known as Noise using armor known as Symphogear. To protect a girl named Hibiki Tachibana, who got severely wounded by the Noise, Kanade sacrificed herself. Two years later, as Tsubasa has fought the Noise alone, Hibiki ends up gaining the same power as Kanade.

Senki Zesshou Symphogear is finished and has 13 Episodes. It is also Known as: 戦姫絶唱シンフォギア, Senhime Zesshou Symphogear

3. K-On!!

For two full years, Yui, Mio, Ritsu and Tsumugi have worked together to keep the struggling Light Music Club alive. With a new school year there are new and scary challenges ahead!

K-ON! Season 2 is finished and has 26 Episodes. It is also Known as: けいおん!!, Keion 2, K-On!! 2nd Season

4. Ore ga Ojousama Gakkou ni "Shomin Sample" Toshite Gets♥Sareta Ken

Kimito Kagurazaka is a commoner with a fetish for men's muscles—or at least that's the lie he must keep telling if he wants to keep himself out of trouble at the elite all-girls school, Seikain Academy. Kidnapped by the school under the assumption that he prefers men, Kimito is made to be their "commoner sample," exposing the girls to both commoner and man so that the transition to the world after school is not jarring. Threatened with castration should his sexual preferences not match the school's assumptions, Kimito keeps up the facade to protect his manhood.

But there are eccentric individuals around every corner who begin to make Kimito's life even more difficult. Among them are Aika Tenkuubashi, a social outcast who blurts out whatever comes to mind; Hakua Shiodome, a young genius; Karen Jinryou, the daughter of samurai who is obsessed with defeating Kimito; and Reiko Arisugawa, the perfect student who has delusions of marrying Kimito. Along with the commoner himself, these four girls make up the Commoner Club, which attempts to teach the girls more about life outside the school, while Kimito gradually learns about the odd girls surrounding him.

Shomin Sample is finished and has 12 Episodes. It is also Known as: 俺がお嬢様学校に『庶民サンプル』としてゲッツされた件, Story in Which I Was Kidnapped by a Young Lady's School to be a "Sample of the Common People", Ore ga Ojou-sama Gakkou ni "Shomin Sample" Toshite Rachirareta Ken

5. K-On!

Hirasawa Yui, a young, carefree girl entering high school, has her imagination instantly captured when she sees a poster advertising the "Light Music Club." Being the carefree girl that she is, she quickly signs up; however, Yui has a problem, she is unable to play an instrument.

When Yui goes to the clubroom to explain, she's greeted by the other members: Ritsu, Mio, and Tsumugi. Although disheartened at Yui's lack of musical know-how, they still try to convince her to stay to prevent the club's disbandment. After playing Yui a short piece which re-ignites her imagination, they succeed in keeping their new member and guitarist.

Along with the tasks of school and homework, Yui begins to learn the guitar with the help of the other band members, experiencing many mishaps along the way. However, with the school festival drawing near and Yui getting stuck with her practice, will the Light Music Club be ready in time for their debut?

K-ON! is finished and has 13 Episodes. It is also Known as: けいおん!, Keion, K-ON! Season 1

6. Senki Zesshou Symphogear G

Peace had seemed to return to the world when Hibiki, Tsubasa, and Chris had saved the planet from the Luna Attack with their song. However, 3 months later at a joint concert between Tsubasa Kazanari and foreign superstar Maria Cadenzavna Eve, the Symphogear team is faced with her dangerous declaration of war against the world. Maria and her allies Kirika and Shirabe have a fearful power backing them: The power of a dark Symphogear.

Senki Zesshou Symphogear G is finished and has 13 Episodes. It is also Known as: 戦姫絶唱シンフォギアG, Senhime Zesshou Symphogear G

7. IS: Infinite Stratos 2

Second season of Infinite Stratos.

Infinite Stratos 2 is finished and has 12 Episodes. It is also Known as: IS〈インフィニット・ストラトス〉2, IS: Infinite Stratos 2

8. IS: Infinite Stratos

Japan engineered an armed powered exoskeleton "Infinite Stratos" and it became the mainstream of weapons. Since only women can operate IS, women dominate the society over men. Orimura Ichika is a 15-year-old boy and accidentally touches an IS placed in the IS pilot training school. He is found to be the only man who can operate IS and forced to enter the training school. Ichika's busy school life surrounded by girls has begun.

Infinite Stratos is finished and has 12 Episodes. It is also Known as: IS 〈インフィニット・ストラトス〉, IS

9. Akebi-chan no Sailor-fuku

Robai Private Academy is a well-known girls’ junior high school in the countryside. Komichi Akebi is a girl who, for a certain reason, has dreamed of wearing a Robai Academy sailor uniform. Her dream comes true, and her heart races as the day of the school entrance ceremony arrives. With her heart set on her new sailor uniform, Komichi embarks on the junior high school life of her dreams♪ Komichi dashes headlong through days full of “firsts”—classmates, school lunches, club activities, and more—in this sparkling diary of girlhood. “I hope I can make a lot of friends.”

Akebi's Sailor Uniform is finished and has 12 Episodes. It is also Known as: 明日ちゃんのセーラー服, Akebi-chan no Serafuku, Akebi-chan no Sailor Fuku

10. Maria†Holic Alive

Miyamae Kanako, a high school girl, who is allergic to boys, enrolls in an all-girls school, hoping to find a female romantic partner. However, her ideal candidate, Shidou Mariya, turns out to be a mischievous cross-dressing boy, who together with his sarcastic maid Shinouji Matsurika, give Kanako really difficult times.

Time passes and Kanako still fantasizes about her ideal female romantic partner, to no avail, alas. Living in the same room at the dormitory Mariya and his outspoken maid keep on challenging Kanako's sense of reality on a daily basis.

Maria†Holic Alive is finished and has 12 Episodes. It is also Known as: まりあ†ほりっく あらいぶ, Maria+Holic 2, Maria Holic 2, MariaHolic 2

11. Girls & Panzer: Saishuushou Part 4

The fourth film in the six-part Girls und Panzer: Saishuushou film series.

Girls & Panzer: Saishuushou Part 4 is a Movie. It is also Known as: ガールズ＆パンツァー 最終章 第4話, Girls und Panzer das Finale Part 4

12. Toaru Kagaku no Railgun S

Mikoto Misaka and her friends are back, investigating rumors across Academy City. Soon, Mikoto discovers something terrifying: horrific experiments are taking place throughout the city, involving the murder of thousands of espers. Moreover, these espers are far from just ordinary people: they are clones of Mikoto herself. Feeling responsible for their treatment, she sets off to put an end to the experiments; however, the forces opposing her are much more dangerous than she anticipated, and Mikoto finds herself up against some of the most powerful espers imaginable.Toaru Kagaku no Railgun S continues the story of the Railgun as she desperately fights to put an end to the inhuman experiments that she believes she helped cause, her life dragged deep into despair in the process. There's never a dull moment in Academy City, but no one ever said all of them would be pleasant.

A Certain Scientific Railgun S is finished and has 24 Episodes. It is also Known as: とある科学の超電磁砲S, Toaru Kagaku no Railgun 2nd Season, A Certain Scientific Railgun 2nd Season

13. Black★Rock Shooter (OVA)

On her first day of junior high school, Mato Kuroi meets Yomi Takanashi. Though Yomi is initially taken aback by Mako's straightforward personality, the pair quickly becomes friends and begin to spend time together daily. As a sign of their friendship, Mato gives Yomi a cell phone charm—a blue star, identical to her own.

However, when the two enter their second year, their relationship starts to change. Placed in a different class, Mato begins to spend more time with Yuu Koutari instead, a girl she met through the basketball team. In fact, the former best friends drift apart so much so that Mato cannot find Yomi anywhere, as if she had disappeared entirely.

Elsewhere, Black★Rock Shooter is on a quest to vanquish the Dead Master. These two, while opposed, bear a connection not unlike Mato and Yomi. As their stories begin to cross, it seems Yomi's disappearance may have to do with the blue star-shaped charm and the legendary gunslinger herself.

Black★Rock Shooter (OVA) is finished and has 1 Episodes. It is also Known as: ブラック★ロックシューター, BRS OVA, Black Rock Shooter OVA

14. Mashiro-iro Symphony: The Color of Lovers

When boys suddenly get into places where they've never been allowed before, some girls tend to get upset. So when the decision is made to merge the elite Yuihime Girls' Private Academy and the coeducational Kagamidai Private Academy, everyone wants to take extra care in avoiding trouble while bringing the two Privates together. Therefore, rather than just bringing the Kagamidai boys into the Yuihime girls' school all at once, a plan is concocted in which a group of test males will be inserted into the Girls' Private Academy first.

Thus, poor young Shingo finds himself being thrown as a sacrificial lamb to the lionesses of Yuihime, who aren't exactly waiting for him with open arms. Will Shingo manage to survive the estrogen soaked death pit that is Yuihime? Can the girls learn to be more receptive to the boys? And just how long until something involving panties will cause emotions to flare, sparks to fly and the battle of the sexes to explode?

Mashiroiro Symphony: The Color of Lovers is finished and has 12 Episodes. It is also Known as: ましろ色シンフォニー -The color of lovers-, Mashiro-iro Symphony: Love Is Pure White, Mashiroiro Symphony: The Color of Lovers, Pure White Symphony

15. K-On! Movie

With graduation right around the corner, the girls of the Light Music Club are headed to London for one last hurrah! Their overseas journey will lead them on a trip of discovery and friendship as they prepare for one last amazing encore.

K-ON! The Movie is a Movie. It is also Known as: 映画 けいおん！, Eiga K-On!, Keion Movie

16. Love Live! School Idol Project

Otonokizaka High School is in a crisis! With the number of enrolling students dropping lower and lower every year, the school is set to shut down after its current first years graduate. However, second year Honoka Kousaka refuses to let it go without a fight. Searching for a solution, she comes across popular school idol group A-RISE and sets out to create a school idol group of her own. With the help of her childhood friends Umi Sonoda and Kotori Minami, Honoka forms μ's to boost awareness and popularity of her school.

Unfortunately, it's all easier said than done. Student council president Eli Ayase vehemently opposes the establishment of a school idol group and will do anything in her power to prevent its creation. Moreover, Honoka and her friends have trouble attracting any additional members. But the Love Live, a competition to determine the best and most beloved school idol groups in Japan, can help them gain the attention they desperately need. With the contest fast approaching, Honoka must act quickly and diligently to try and bring together a school idol group and win the Love Live in order to save Otonokizaka High School.

Love Live! School Idol Project is finished and has 13 Episodes. It is also Known as: ラブライブ! School idol project, Love Live! School Idol Project

17. IS: Infinite Stratos 2 - World Purge-hen

A program called "World Purge" sends illusions to all the girls about their ideal fantasies.

IS: Infinite Stratos 2 - World Purge-hen is finished and has 1 Episodes. It is also Known as: IS〈インフィニット・ストラトス〉2　ワールド・パージ編, IS: Infinite Stratos 2 - World Purge-hen

18. Princess Nine: Kisaragi Joshikou Yakyuubu

Keiko Himuro, Chairman of the Kisuragi School, puts together an all-girl baseball team led by Ryo Hayakawa, daughter of a legendary pitcher, in hopes of proving that girls can compete just as well as boys. Their goal: Koshien Stadium, where only the best teams get the opportunity to play.

Princess Nine is finished and has 26 Episodes. It is also Known as: プリンセスナイン 如月女子高野球部, Princess Nine: Kisaragi Joshikou Yakyuubu

19. Juuou Mujin no Fafnir

Midgar, all-girl academy, would have been notable just for the action of accepting its first and only male student, Yuu Mononobe. But Midgar stands out for much more than that: it's a school exclusive to a group of girls known as D's. Each of them have extremely powerful abilities in generating dark matter and manipulating it into powerful weaponry.

The D's didn't exist twenty-five years ago, and only appeared after a number of mysterious, destructive monsters known as "Dragons" started appearing around the world. Strangely, just as suddenly as they appeared, they vanished. In their destructive wake, some girls started being born with symbols on their bodies and powers similar in nature to those wielded by the Dragons themselves.

Now the D's attend this school, hoping to harness and utilize their powers against the Dragons. Yuu is their latest member and is extraordinary for being the only known male D in existence. Now he must forge relationships with the girls around him, including his long separated sister who attends the school as well, and work with them to investigate and eliminate the threat of the powerful Dragons.

Unlimited Fafnir is finished and has 12 Episodes. It is also Known as: 銃皇無尽のファフニール, Juuou Mujin no Fafnir