From Midnight Scans: Even though Komachi was born into a doctor's family, she's extremely shy, has a phobia of blood and is extremely bad in sports. Studying is the only thing that she can do well, but she totally failed her high school entrance test! Instead of entering her first choice "ELITE class," she entered the "SPECIALITY class," where people who want to specialize in sports and the arts are. Macho with dreadlocks, bearded lolita... Being surrounded by these people is already very terrible! But on top of that, the famously talented sprinter, Oosaki Hiro, has zeroed in on her and has his eye on her...

After their parents are killed in a plane crash, Ryuuichi and his younger brother Kotarou are taken in by the chairman, who they never met before, of an elite academy. Ryuuichi becomes the school daycare's new babysitter.

Spin off of Hitsugi no Chaika. Takes place in high school.

A school is transported into a fantasy world that is at war with dragons, and everyone in the school is given a powerful dragon slaying sword, and told the only way to get home is to help win the war. But there is a catch, to use the swords power you must be...a virgin!

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From Nevermore Scans: For the very first time, a serialization that’s published in China and Japan simultaneously! A love adventure drawn by China’s top shoujo manga artist! “You will never be able to get a boyfriend for as long as you live!” Chiyo Ren is a very unfortunate girl who got put under a spell when she was a child. Sure enough, up until the present, she has never managed to get a boyfriend. The only person who can break the spell…is the malicious, ikemen, ‘Kamisama’…!?

Gakuen Heaven is the story of Oshino Makoto in his attempt to become a teacher, in order to fulfill a promise made to his childhood friend and first love Koiwai Ayano, who also promised that when they see each other again they will get married. Unfortunately, he fails miserably and ends up as a substitute teacher in an all-girls private school governed by his grandmother. He meets a lot of female students there, especially Narusawa Tsugum; as well as a teacher who resembles his long lost first love, Asagiri Ayano. He even becomes the love interest of the substitute principal, his cousin Kyoko.

In the Gakuen Heaven (HIGURI You) series:

V.1 - Gakuen Heaven
V.2 - Nakajima Hen (Closer to You)
V.3 - Tanba Hen
V.4 - Endou Hen - Calling You
V.5 - Shichijou Hen - Sweet Sweet Darling!

Asahina Yuki, a young man with no special skills save for good luck, was invited to attend Bell Liberty, a legendary high school for elite students. Immediately after arriving, he was given an armband by a mysterious ninja who begged him to protect the school. That armband is the proof of being the Ace of the school - the student council president!

Itou Keita is a boy with no remarkable talents beyond his better-than-average luck, until one day he receives an acceptance letter out of the blue inviting him to attend the prestigious all-boys academy, Bell Liberty School (BL School). Why has he been admitted to this amazing academy, and how can he possibly live up to the expectations of whoever let him in? As he settles in to his new life, Keita is sure to find companionship in his rather eclectic cast of schoolmates.

From Aerandria Scans:

Higashisanjou Ayako is called the queen of Hibarigaoka Academy – she’s smart, beautiful, cool, and practically perfect at everything she does. However, little does everyone know that she has another side to her. One day, Yuzuki Haruka, who everyone calls the king of the academy, finds out Ayako’s secret. Will our queen have a peaceful and perfect life again with her secret in the hands of this little sadistic king?

Shiro and Kuroh are not the only ones who go to high school. Instead, the members of Homra (including their leader Suoh) and the members of Scepter 4 attend school together. The students are sometimes lax, but at other times, they are hot-headed.

By Pink Rose Scans:
This is the tale, where the progress of senior high-school reorganization is accompanied by declining birth rate,
where survivors are on the line, in regards of the reformation of their precious school
challenged to increase the number of their students, This is the epic story picturing
The Student Council of Baddoun High fights of youth.

This is the story of a girl who transfers to a new school and quickly becomes popular, and also becomes the focus of another student who focuses on the occult, and for good reason…

The stage is set in the prestigious Private Joshi (girls) Oka High School, more commonly known as Joshi High. It became co-educational a few years ago, but females still heavily outnumber the males. So small is the number of men that it could be easily counted. While one would think guys would be pampered in such a harem school, the reality is far from heavenly. It is the world of female domination.

Ever since Sasami was a little girl, she's admired those who defend justice. She loved watching shows about Magical Girls and Sentai Rangers, but the shows she loved watching the most were police dramas.

Years have passed and Sasami has become a police officer herself. Her first assignment is to go undercover and act as a student at Hanagaki All-Girls High School to make sure there are no corrupt teachers or students there.

One night, while helping out the photgraphy club, they enter the supposedly empty library to find someone there. After trying to run away, one of the club members concludes that she's trying to steal expensive books that should be locked away but are missing. Sasami chases after and catches her, telling her she's with the police. The girl turns out to be her classmate, Sakuraba.

After finding out it was a misunderstanding, she goes to apologize and ask that she keep it a secret that she's with the police. Sakuraba then reveals that she is the police officer in charge of Hanagaki All-Girls High School, and that Sasami must have been assigned there by mistake. Why was Sasami assigned there and what will happen between her and Sakuraba?

From MangaHelpers:

Another version of the story of the Inspectors and Enforcers from Psycho-Pass, but this time in chibi style! All of the main characters are now in chibi form, and are attending a "Psycho-Pass Academy," which is basically a chibi-fied version of the scenario of the original series. New student Tsunemori and her classmates will use their Dominators to keep their school's peace! [tethysdust]

From the author of Necromancer.

Onikubi High School is governed by 100 strict rules. In order to set the students free from the rules perpetually enforced by disciplinary committee president Subaru Ryuuzaki, Oni High Madonna Reina Katou speaks up! Follow the inevitably comedic school gag oneshot!

At Matabi Academy, students are allowed to bring their pet cats to the dorms. For Yumi Hayakawa, whose favorite hobby is making clothes for her kitty Kansuke, Matabi seems like a sure bet. After all, nothing can possibly go wrong with her best friend at her side! But on the first day of school, the two find themselves face-to-face with a murderous demonic minion on campus! Will Yumi and Kansuke be able to defend themselves and their school against an ancient cat demon’s thirst for vengeance?

A story where students face off against teachers to bring down the tyrannical education system.