5 Anime Where The MC Joins An Alll Girl School

1. Armed Girls Machiavellism

The Private Aichi Symbiosis Academy was originally a high school for high-class girls. When it became co-ed, the girls, out of fear, asked to be permitted to bring weapons to school. When that was enforced, a five-member vigilante corps-like organization called the "Supreme Five Swords" was also formed. After generations passed Fudou Nomura was enlisted into this school after previously being expelled, but whether or not he will be disciplined the way the other former delinquents who enrolled there in the past is to be answered.  

2. Undefeated Bahamut Chronicles

Lux, a former prince of an empire named Arcadia that was overthrown via a rebellion five years earlier, accidentally trespasses in a female dormitory's bathing area, sees the kingdom's new princess Lisesharte naked, incurring her wrath. Lisesharte then challenges Lux to a Drag-Ride duel. Drag-Rides are ancient armored mechanical weapons that have been excavated from ruins all around the world. Lux formally known as the strongest drag knight got renounced as the "undefeated weakest after his kingdom was overthrown, but he hides a second identity known as the "black hero."

3. Blade dance of Elementalers 

On his way to Areishia Spirit Academy, Kamito Kazehaya runs into a naked Claire Rouge, a student who had been bathing as part of a purification ceremony. She had been preparing to form a contract with a powerful spirit in order to acquire more power as an "elementalist." Her efforts are wasted, however, when Kamito ends up with the spirit despite the fact that only shrine maidens can become elementalists. Yet to be discouraged, Claire then announces that Kamito must become her contracted spirit instead!After reaching the school grounds, Kamito escapes from Claire and meets Headmaster Greyworth Ciel Mais, who invites him to enroll at the academy. Although his life at Areishia will be far from easy as the only male student among the shrine princesses-in-training, he begrudgingly accepts in exchange for information about his former contracted spirit, Restia Ashdoll. 

4. Unlimited 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.

5. Infinite Stratos

An exoskeleton weapon engineered by Japan, Infinite Stratos (IS) can be piloted only by women. Its power and combat prowess are so immense that an international treaty has been signed banning its use as a military asset. When it is discovered that 15-year-old Ichika Orimura is the only male capable of steering an IS, he is forcibly enrolled in the Infinite Stratos Academy: an all-female boarding school, the students of which graduate to become IS pilots. At this training school, Ichika is reunited with two of his childhood friends, Houki Shinonono and Lingyin Huang, and befriends Cecilia Alcott, an IS representative from the United Kingdom. Guided by the legendary pilot Chifuyu Orimura—their strict homeroom teacher and Ichika's older sister—Ichika and the girls will need to use everything at their disposal to defend themselves and their academy against the dangers that will arise during the course of their thrilling school life.