Minami-kun spots a poster recruiting new members for the Magical Girl Club. Thinking "Cosplay cuties woohoo!" he decides to join... What the hell!? It's not cosplay—we actually become magical girls??

A slice of life love-comedy revolving around magical girls and slippery slopes.

From Easy Going Scans:

Chang An in the Tang Dynasty of China (618-907): The demon star is passing through the sky, calamity is about to befall the Tang Dynasty - because of a woman.
Skilled in martial arts and war tactics, Princess Li Chang Ge sets out to avenge her family and take back the throne.

“I hate men!”

Mao was harshly dumped by her boyfriend. She fell asleep while feeling totally dejected... and turned into a man the next day! Not knowing how to turn back, it was decided that Mao has to live in a dorm as a guy. However, her roommate, Ryuusei, is extremely curt and annoying.

How will her life turn out?!

With 99 nations conquered and the cup of the ruler in her hands… you'd think she was off to a heroic conquest, but the great queen's Cecia's real concern was her uncomfortable corset?

The queen of Valencia suffered from complicated laces and heavy corsets, and thus ordered her trusted brother, Duke Ennon Lionheart to bring her a comfortable clothes.

Meanwhile, Yuri, a clothing designer was killed in an accident after suffering from a small minimum wage at a medium-sized clothing company in Korea. She was reborn in a medieval country ruled by Cecia.

Yuri vowed to revolutionize the outdated clothing dilemma, so she dressed up as a man and worked as a designer at the top of the continent's highest court to do easy business.

But… what happens when Ennon discover's Yuri's true identity…?

Tatsumi enters highschool with his childhood friend Amasawa Kokoro, nickname Ama-chin, who is a extremely feminine looking trouser-wearing boy that likes to mess with peoples expectations of his gender.

Shinichi and Ichigo, who are childhood friends among their neighbors, are first-year high school students in the middle of their youth. There was a longing person who had a feeling for each of them! They couldn't get close to each other just by looking at their favorite person from a distance, but one day in early summer, a bitter gourd-related incident changed their daily lives.

In Tulle, a small county threatened by invasion, Freja lives in a small house by the countryside. Aaron and Alexis, two knights who left the kingdom three years before, return, and slowly the gear of fate begins to turn for Freja.

Ako Kobayashi is a high school girl eagerly awaiting her prince charming to sweep her off her feet, but she has to overcome one small problem: she is so afraid of guys that she breaks out in hives whenever she comes near one. She even rejects the popular Kei Kitaooji who is the first guy to ever ask her out. However, after Kei learns of Ako's condition, he comes to school the next day dressed as a girl and asks her out again.

I was cursed to become a woman in place of the prince, and then he proposed to me?! My best friend from childhood, the high-spec Prince Vincent, and me, his follower Renoa. Though I've always been a loyal yes-man… Even if you're taking responsibility for me, I can't accept that proposal! The infatuating love story between a troublesome prince and his scapegoat attendant!
Original Web Novel: https://ncode.syosetu.com/n1090ff/

Meguru Kaku is a normal high school student, except for the dreams he has about his previous life. One day, an unseasonal new student, Kotaro Kongochi, arrives. He is reunited with a friend from his previous life that he thought he would never meet, but something is wrong with him...?

A man is trapped in a loveless marriage. But as he is on verge of death, he suddenly experiences the medical phenomenon of a so-called "gender change". Reborn as a woman, his wife becomes his life coach.

A boy has become a magical girl, Kazana Sho is going to become more feminine to get stronger...

Kenzaki is a delinquent who saves her classmate Nakajima from some bullies one day, but Kenzaki still has yet to tell him that she has a crush on him.

Links:
Author's Pixiv: https://www.pixiv.net/member.php?id=479833
Author's Twitter: https://twitter.com/TATSUBONi

Naoki Tozawa is adamant in his aim to grow into a man among men, so he decided to go to an all-boys high school with a long history of providing strong and tenacious men for society. However, he is shocked and dismayed when he discovers that after a year of attending the school, many of the students have started coming to school dressed as girls. Rumor has it that the cause of this is a member of the photography club, leading Naoki to confront Ueda, a boy in the club who makes a very convincing girl.

To Chie Souma, a female college student, every day feels depressing when she has no luck with job hunting. She’d much rather end up in an alternate universe, just like in her beloved tripping into another world novels...... Just as she was dreaming of escaping this reality, one day she actually trips into another world! It might be too dangerous in a female body to survive in this world. Chie decides to use the knowledge that she’s gained from reading, lie about her gender, and become “Souma the scholar”, but---!? A manga adaptation of a strategy manual style fantasy.

From the author of the NTR series "1/10 no Hanayome". Read it with that in mind

A violent and muscular boy who dreams in becoming a national champion, unexpectedly turns into a cute girl, how will “she” achieve “her”dreams?

From Tokyopop:

In real life, Roto, Boromid and Ah-Dol are average kids with average problems, but in the virtual world of Lost Saga, they're heroes. They might even become legends... if they can stop bickering long enough to level up. Whether it's werewolves running rampant or a gorgeous pair of troublesome thieves, our boys must be ready for anything, because in Lost Saga nothing is what it seems and murder can happen with a click of a mouse.

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The series centers on the main character Jang-Gun and his friends along with their virtual reality avatars in the computer game world called "Lost Saga". When Jang-Gun logs on as a different character, he "Creates" an AI with a personality from the hacked disk he found when renewing his appearance for his once a year renewal process. Yureka is a flutter-brained, but advanced, AI with powerful stats and a real-life doppelganger. It is his turn to see just how deep his immersion in the virtual world goes.

Shizuku Ishiai, a 2nd year middle school student, loves dancing, but is bad at expressing herself, so she crossdresses and posts videos of her dances on the popular website "Smile Douga", under the alias "Ai". And she had declared the "dancing prince", Hayate, her rival. But, after a few unexpected events, and her attempts to best him, she's somehow thrown into an idol unit with him; furthermore, a MALE one?!

Kuroitsu Tohka is a research assistant at the Monster Develoment Department of the evil organization Agastia. However, the enemies she must fight at present are not heroes. "Problems just before a presentation at a big meeting", "Proposals thrown together in ten minutes", "Impossible demands from the higher-ups"... As long as there is good in this world, there will also be evil. This is a tale of those who fight an unseen battle in the shadows of this standoff between good and evil.