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. 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

3. 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

4. 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

5. Akuma no Riddle

Tokaku Azuma has just transferred to the elite Myoujou Academy, a private girls' boarding school. But there's a catch: she, along with 11 of her fellow students in Class Black, is an assassin taking part in the challenge to kill their sweet-natured classmate, Haru Ichinose. Whoever succeeds will be granted their deepest desire, no matter the difficulty or cost. However, each assassin only gets one chance; if they fail to kill her, they will be expelled.

Despite the extraordinary reward, Tokaku decides to take a different course of action. Though Haru is her target, the young assassin soon finds herself drawn to the very girl she is supposed to kill. With the entire class out for Haru, Tokaku refuses to let her friend die, vowing to protect her from a growing bloodlust.

Riddle Story of Devil is finished and has 12 Episodes. It is also Known as: 悪魔のリドル, Akuma no Riddle

6. 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

7. 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

8. BanG Dream!

When she was a child, Kasumi Toyama felt a heart-pounding thrill every time she gazed at the stars, and she's been looking without success for something that could inspire the same feeling ever since. One day, she comes across a star-shaped guitar in a rundown pawnshop and, for the first time, discovers the thrill she's been searching for. Kasumi becomes determined to form an all-girl band, and her search leads her to four like-minded souls: Saya, Arisa, Rimi, and Tae. Does this band have what it takes to make their dreams of stardom come true?

BanG Dream! is finished and has 13 Episodes. It is also Known as: BanG Dream！, BanG Dream!

9. 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

10. 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

11. Yuyushiki

The story follows the school life of the three girls, Yuzuko, Yukari, and Yui, who join their high school's Data Processing Club. The odd friendship between the three make for wacky humor in even the most mundane of events.

Yuyushiki is finished and has 12 Episodes. It is also Known as: ゆゆ式, Yuyu-shiki

12. Gokujo.: Gokurakuin Joshikou Ryou Monogatari

A story about the humorous misadventures of Akabane Aya, an arrogant high school girl who's constantly trying to outdo her classmates in everything , only to make a fool of herself in the process. Since the story takes place in an all-girls school, expect lots of yuri fanservice innuendos without much seriousness.

Gokujo.: Gokurakuin Joshikou Ryou Monogatari is finished and has 12 Episodes. It is also Known as: ゴクジョッ。~極楽院女子高寮物語~, Gokujyo

13. 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

14. 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

15. High School Fleet

Living by the sea, protecting the sea, and journeying across the sea... They're the Blue Mermaids!

Because of a shift in tectonic plates around 100 years ago, Japan lost much of its area to submergence. To preserve Japan's territories, coastal cities sprung up, one after the other. Eventually, they became marine cities, and along with the expansion of sea-lanes to connect them, the need arose for a sizable staff to protect the seas.

At the same time, maritime jobs were becoming more popular among women. Hence, the Blue Mermaids, tasked with keeping the seas safe, had become every female student's dream job. This is when childhood friends Akeno Misaki and Moeka China enroll in a marine high school in Yokosuka, along with other girls who share their goal of becoming a Blue Mermaid.

High School Fleet is finished and has 12 Episodes. It is also Known as: ハイスクール・フリート, Haifuri

16. 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

17. Maria†Holic

In search of true love, Kanako Miyamae transfers to Ame no Kisaki Catholic school, inspired by how her parents fell in love with each other there. There is just one difference, though: because men make Kanako break into hives, she has actually come to the all-girls school to find a partner of the same sex.

When she meets the beautiful Mariya Shidou, Kanako believes she has found that special someone; however, there's more to Mariya than meets the eye—it turns out that Kanako's first love is actually a cross-dressing boy. Mariya threatens to expose Kanako's impure intentions unless she keeps his real gender a secret, and to make things worse, he also replaces her original roommate so that he can now keep a close eye on her.Maria†Holic follows Kanako as she looks for love in all the wrong places and searches for the girl of her dreams—that is, if she can survive being Mariya's roommate!

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

18. 4-nin wa Sorezore Uso wo Tsuku

Each girl has at least one secret. Rikka, Chiyo, Sekine, and Tsubasa are four good friends in the same class. But each one has a ridiculous secrets...!?

The Little Lies We All Tell is finished and has 11 Episodes. It is also Known as: 4人はそれぞれウソをつく, 4-nin wa Sorezore Uso wo Tsuku