A girlfriend decids to dress up her very effeminate boyfriend in a Yukata, but he takes it personal and accuses her of loving females only, and escapes to the fire work festival. Its a trap oneshot, gender bender fun, and the same author of The Night of the School Trip oneshot.

From Esthétique:

Ding Jiayu dreams of being a photographer. Her idol is none other than Yung Jo. When Yung Jo's photography company holds an audition to find a new photographer, Jiayu decides to take a chance. The thing is, Yung Jo's company doesn't hire women, so Jiayu has no choice but to dress up as a man and enter. Yung Jo takes great interest in Jiayu's talent and makes her his apprentice. It may seem like a dream to work with your idol, but for Jiayu, it's nothing of the sort. She takes a beating from Yung Jo everyday, and since all the crew members think she is a guy...

When Tae Yeon Im finds out that the idol star that she's adored for ages is currently attending the same school as her identical cousin, Jung-Woo Im. She convinces her cousin to exploit their similitude and switch places, or maybe he just likes wearing a skirt? So, she will dress as him, attend his school, and try to get close to her lover boy. Meanwhile, he will dress as her, attend her school, and revel in its sea of babes. The plan seems flawless until Tae learns of a bully named Ga-Wun Kim who likes to beat up on poor Jung-Woo. While Jung-Woo finds that being a woman might not be as thrilling as perceived.

From Shoujo Manga Maniac:

Ami has always been jealous of her little brother Chihiro, who's a popular model for girls' clothing. Now he's old enough to attend her school, and all the boys are crazy about him, even knowing he's a boy! Still, he's her brother and Ami loves him, but are her feelings for him beyond those of a sister for her brother?

From Aerandria Scans:

Welcome to Hot Cafe, where the tea is delicious and the waiters are beautiful. Eisei is a high-school student who isn?t looking for a part-time job, but her handsome looks land her a job as a waiter at the trendy cafe. Even more surprising, Eisei starts to fall in love with her co-worker, Kouno. But how will Kouno react when he finds out that Eisei shouldn?t be a waiter, but a waitress?!
Follow the patrons and employees as they discover that Hot Cafe serves coffee and tea with a dash of romance.

Fuuma Kotaro, a ninja, is a Kagemusha (body double) for Houjou Ageha, a princess. He masquerades as her when they go to school.

From Tinte:
Suh Hyun-bin grew up under the cruel hand of street gangsters, but after her little brother dies, Hyun-bin runs away and is taken in by a rich family to be trained to become a bodyguard. However, she must hide that she is female, and pose as a man. And so, for eight years, she grows up as a cold, male, bodyguard. It looks like she'll be this way forever--until a fateful encounter with Lee Yun-ha shakes her very foundations, and leaves her conflicting with herself, as her feelings of love clash against her feelings of duty.

Haruka and Kanata's cousin Yuzu is coming to live with them, but she hates men. Enter Haruka's brilliant idea: Kanata should crossdress.

Oneshot from Himegimi no Tsukurikata

Hisai Aoba, a 13-year-old male idol, is threatened to put off his upcoming stage performance. To prevent himself from danger, he hired a personal bodyguard, Tsukasa. At first, he thought that Tsukasa was just a taciturn and rude guy, but little did he know that...

A collection of three separate stories.

I. Sui-Ren is Here.

II. Alice in Cyberland.

III. Mother's Guardian.

Mei no Naisho revolves around the life of the title character Mei Haruna, an effeminate young boy who was raised by his witch mother as a girl, and always thought of himself as female. His mother was the only family he had, so after she died, he transfers to an all-girls high school and resides in the school's dormitory with his familiar Abel, who is talking cat, and his roommate Fuuka Honjou, who is a member of the public morals committee.

Shortly after arriving at the school, his new friends discover after a magical display in the dormitory community bath that he is actually male, though this comes as quite a shock to him despite him being aware of the physical differences between him and normal girls. Despite him being found out, and after some helpful intervening of the perverted student council president, the principal of the school decides that he can stay at the school.

The next day, Mei comes to school with Fuuka and apologizes for hiding the fact that he was a witch, and informs the others how he is apparently male. The other students quickly accept him as one of their own, and are impressed how he can use magic.

From Storm in Heaven:
After a scandal got him kicked out of his position at court, Takaaki's been idling the days away at his manor, impulsive and bored. Then one day his friend Naruhito stops by and tells him an insane story about the most beautiful woman alive -- and drags him off in his attempt to win her heart. Tagging along, Takaaki soon realizes that the "Princess" isn't exactly who she (he!?) seems to be. Who exactly is Princess Kaguya, and what is the dark secret behind her (his!?) past?

Set three months after the first series.

The twins Maria and Noel have always lived together and are very closely linked. When Maria decides to enter Morinomiya School because of the beautiful eyes of its basketball coach, Noel, who refuses to be separated from his sister, decides to enter the same establishment. Unfortunately, there are no spots left for boys. He thus decides to pass himself off as a girl! But school life is not easy when one must constantly play in a comedy! Especially when Noel rapidly falls in love with Miyu, a fellow classmate, while he himself is courted by another student.

Tomo Fukuya loves taking pictures of himself while cross-dressing, and he's gained some notoriety among his schoolmates because of it. He participates in his school's beauty contest during the school festival against his friend Kei Okabe.

17 year old exemplary student Bae Sugu lives alone with his father, the vice principal of his school. Weighed down by his father's expectations, Sugu has to hide his one true passion: swimsuits. He does not know where it comes from, but his passion is pure and genuine - and often misunderstood. But one day, when Sugu is secretly taking pictures of swimsuits by the pool, he is caught by his homeroom teacher who forces him into something ridiculous. Can Sugu find something to get out of the standstill his life has come to? Can his heart beat again? Webtoon from Naver

From Girls' Generation Scanlations:

1-3) Love at Full Speed
Keichi and Sora live a happy life now that they've moved in together. Keichi work as a director at a design office and Sora works as a hostess in a bar while attending university. The odd thing about all that is they're both men, and there's a third person coming in between them. Can Sora and Keichi struggle to live their happy lives in peace, or will the third person win...?

4) Trip to the Hot Springs
Keichi and Sora take a trip to the hot springs.

5) Let's Go, Love Birds!
Kai is a Librarian who is trying to get used to the fact that his lover Iwanuma is raising his deceased sister's 2 young children.

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, what awaits Mizuho in the future?

Brothers Akira and Suguru love to cross-dress and have no qualms about showing their panties, something their neighbor Hiro tries to prevent.

Mizuho can't believe his ears when Grandpa's will is read out. Grandpa's final wish is for Mizuho to attend the same academy as Mizuho's mother. The catch is it's an all-girls school. With the help of his friend Mariya however, he gets a makeover good enough to fool everyone at the academy.