From Hells_Castle: Tashiro Mizuho is your typical middle school teen... except for the fact that he is a cross-dresser! When an upper-classman's sister transfers into his class after living abroad, he begins to develop feelings for her and even considers returning to being a male. What awaits Mizuho in the future?
Two teens see how the other half lives! When her mad scientist grandfather accidentally switches their bodies. Akira Uehara is mortified when his best buddy starts hitting on "him," and is embarrassed to look at "himself" in the mirror in her underwear! He can't wait to get back to being a boy. But Nanako Momoi has other ideas--she is starting to enjoy life in Akira's body! From Tokyopop: Rude girl and effeminate boy switch bodies and find that it might be a better fit for both of them. Lots of crazy comedy. Nanako Momoi is the belle of high school... as long as she stays quiet. Once she shows her true self, guys' dreams are shattered for she is a true tomboy. Akira Uehara has the looks and brains, but, unfortunately, his personality is so dull it overcasts a shadow, and nobody notices him. One day, Nanako's grandfather comes up with a crazy invention, and Nanako and Akira trade Bodies! She's him, and he's her!
Junichi Sasaki joins his school's drama club upon entering high school. However, he soon finds himself dressing up as a girl for his first stage performance.
--- that is the only weapon that can oppose the mysterious life form visiting the earth. The protagonist, Kirasagi Hayato, aims to become a using this Hundred. He managed to get into the battleship university . However --- "I wanted to see you, Hayato!!!" "H-How do you know my name?" Around the roommate, Emil Crossford, who somehow knows him well (?), Hayato gets an uneasy feeling. What's more, just after the entrance ceremony, he gets asked for a duel by the campus' strongest martial arts master Claire Harvey...!? The ultimate academy battle begins here!
From BangAQUA: A marvelous actor who has stage fright plays various roles in real life! The agency Catherine is the company which sends so-called extras in real life. Yaegashi Taiga, a marvelous actor that has stage fright, tries his best to fulfill the requests he is given by this company. One day, he is told to work on a request with the newbie Amae Shizuku... But Shizuku has a secret and...?! Please come to our office if anything troubles you! The excellent extras will support you throughout your daily life.
A trap named Nono goes to his lesbian friend, Sei, to become cuter than he already is...Note: They're both separate oneshots, but since they're prequel/sequel I just put them together. And traaaaaaaps ;3
From Vampire Knights: TAKAISHI Minori is a cute and perky female fast-food worker who is adored by all the female customers because she looks like a teen idol--a MALE teen idol. Minori is a tomboy and has short hair, so she is often mistaken for a boy. One day after work, Minori spots an unfair fight going on, and leaps into the middle of the fight, ready to even the odds…only to be mortified to learn that she landed right in the middle of a music video shoot for the popular boy band GOLD! She is dazzled by Tomoya, the leader of GOLD. Minori apologizes for her mistake and is about to continue on her way, but not before one of GOLD’s managers sees her and gets a great idea…
Gender Bender retelling of Suzumiya Haruhi no Yuutsu.
From Pink Everlasting Dream Scanlations: Sakura Aki is a penniless high schooler who likes to cook and does other "unmanly" things. His grandfather and father are disciplinary on gender roles and beat up Aki everytime he does a thing that women would usually do, like cleaning. When his father leaves him absolutely broke, and with his grandfather realizing Aki's "unmanly" flaws, he sends him to live at one of the dorms at an all girls' school that he runs, a school where distinguished young ladies of the country attend, the Hanayashiki - Flower Estate-, to teach him a lesson. He meets Kitahiro Renge, a girl with un-ladylike manners and a meat loving obsession. An encounter that's going to save Aki Sakura or just another problem in sight?!
Just before they enter high school, the boys Meguru and Shou are whining about the fact that neither of them has a girlfriend. A strange, large-breasted woman shows up, claiming that she will fix their problem, and kisses Meguru. This odd occurrence is pushed out of the boys' minds when they meet up with Souko, a friend from elementary school, who is going to be in their high school. She's grown up into a pretty young girl, and it seems like the boys might have a shot with her! That evening, Meguru realizes that the strange kiss may have had more meaning than he thought: he's turned into a girl! He convinces Shou and his mother of his identity, but no one has any idea how to turn him back. Now he's going to have to learn how to be a girl and let go of his hope of dating his cute childhood friend Souko. What will happen to his hopes for a popular high school life?
Talentless, shy Tsubasa has just been accepted into the prestigious Seiko Academy. He soon gets mixed up with the most popular kids in school -- and the entertainment world! Forced to join the pop idol group RINX as their lead FEMALE singer, Tsubasa soon finds himself stuck in the middle of a cross-dressing comedy full of mistaken identities, blackmail, and kidnapping!
Based on a popular light novel. from Baka-Updates Manga: The protagonist is a guy who is among the stupidest of the stupidest in the school. In this school, your grades can, under the supervision of teachers, take a virtual form to do combat! However, if you leave an examination half way, you get zero marks. A bright and cute girl, Mizuki Himeji, was having a high fever during the examination. Despite her potential to be the second highest scorer in the level, she obtained zero marks for having left due to her illness and is thus allocated to the worst class, class F. Grades mean almost everything. For Class A, they have a smart-looking teacher, a plasma TV as big as the entire wall as their blackboard, personal laptops, personal air-cons, refrigerators, adjustable seats and all kinds of different appliances. Within the refrigerator, there are all kinds of drinks and snacks. Their ceiling is made of glass, the wall lets them put up high-class drawings and plants. As for Class F, the worst class... They have Japanese desks and seat paddings. Their blackboard is dirty and there is no chalk even! Someone complains that the legs of his desk are broken, so the teacher asks, "Didn't we distribute some glue to stick wood together? Glue it back yourself later." Another one complains that wind is blowing in from the broken window. The teacher says, "I got it. I will apply for plastic bags and invisible glue to fix it later." There are spider webs everywhere, not a patch of the wall is clean. A unique moldy smell spreads across the entire room; it must be from the old tatamis used to tile the floor. This is the status of class F. The protagonist feels displeased at such an arrangement, and seeks help from his friends to try to make a change through summoning war!! And they devise all kinds of plans to try to beat the famous class A, intending to get class A's classroom and equipment if they win!!