All the gender bender shows I could find on Viki.

Not on the list:
•Empress Ki
•Ma boy
•Taddao Bussaya (it’s really good)
•Nail shop paris

Gender Bender Dramas

KBS2

During the Joseon Dynasty, Kim Yoon Hee (Park Min Young) disguises herself as a boy to support her struggling family by taking entrance exams for other students at Sungkyunkwan University. When the principled Lee Sun Joon (Park Yoo Chun) discovers her scheme, he unexpectedly helps her take the exam under her brother's identity and enter the university herself. They become roommates and classmates, with Yoon Hee befriending the playboy Goo Yong Ha (Song Joong Ki) and rebellious Moon Jae Shin (Yoo Ah In), while simultaneously developing feelings for Sun Joon. As she struggles to maintain her secret identity, Yoon Hee must navigate the challenges of university life and her growing emotions. This is a 2010 South Korean historical drama series based on a bestselling novel and directed by Kim Won Suk and Hwang In Hyuk.

Sungkyunkwan Scandal

Aspiring nun Go Mi Nyeo (Park Shin Hye) never expected to receive this mission: stand in as her twin brother Mi Nam in the idol band A.N.Jell while he tries to get a botched plastic surgery revised. Suddenly thrust into the glamorous and cutthroat world of K-pop, Mi Nyeo must navigate the challenges of living as a man while keeping her true identity a secret from the band's demanding leader, Hwang Tae Kyung (Jang Geun Suk), the kind-hearted Kang Shin Woo (Jung Yong Hwa), and the cheerful Jeremy (Lee Hong Ki). As she struggles to maintain her disguise amidst hilarious mishaps and close calls, Mi Nyeo finds herself entangled in a complicated web of friendship, rivalry, and unexpected romance, all while trying to achieve her brother's dream.

You're Beautiful

The A.N.JELL Team

After enduring tragedy and struggles as a child, Gil Ra Im (Ha Ji Won) made a successful career for herself as a stuntwoman, although she has little patience for nonsense. When she meets narcissistic and arrogant CEO Kim Joo Won (Hyun Bin), she despises his attitude, but he feels strangely drawn to her in a way he can’t explain. Joo Won tries to win Ra Im over, but she rebuffs his advances, uninterested in the showy things he has to offer her. Their adversarial relationship takes an absurd turn when their souls swap, and they’re forced to act in each other’s lives while they try to find a cure for their conundrum – but neither of them could've expected that their body-switching would lead to falling in love.

Secret Garden

SG Team

In desperate need of money, tomboy Go Eun Chan (Yoon Eun Hye) takes up an additional part-time job as a delivery worker to help make ends meet. Her job leads her to Choi Han Gyeol (Gong Yoo), a wealthy slacker who’s sick of his grandmother setting him up on blind dates. He’s been tasked to rebuild his family’s struggling coffee shop, and decides to hire attractive young men to boost sales. Mistaking Eun Chan for a boy, Han Gyeol decides to hire her as a cafe employee – and to pretend to be his gay lover to ward off unwanted blind dates. As Eun Chan juggles her secret identity and her new job, an undeniable connection blossoms between her and Han Gyeol, who struggles with his unexpected attraction to Eun Chan. Will love find a way to conquer all?

Coffee Prince

In this gender-bending musical drama, Gao Mei Nu (Cheng Yu Xi) is thrust into an unexpected role when her brother needs her help. After Gao Mei Nan (also Cheng Yu Xi) is unable to join the popular boy band A.N.JELL due to a medical emergency, Mei Nu – who is training to become a nun – must disguise herself as a male idol. She must navigate the challenges of maintaining her secret from the band's lead vocalist Huang Tai Jing (Jiro Wang), guitarist Jiang Xin Yu (Hwang In Deok), and rapper Jeremy (Evan Yo). As she struggles to keep her true identity hidden, Mei Nu must prove herself as a performer while avoiding discovery. This is a 2013 Taiwanese drama series, a remake of the popular 2009 Korean drama "You're Beautiful."

Fabulous Boys

FABULOUS 

SETTV

Pi Ya Nuo (Megan Lai) was born a girl but destined to live as a boy for 25 years due to a fortuneteller's prediction that she would not survive childhood otherwise. Shy and aloof, she keeps her true identity hidden, which ironically makes her attractive to those around her. When she accidentally helps triad leader Du Zi Feng (Baron Chen) and his sister Du Zi Han (Mandy Tao), her life takes an unexpected turn. Zi Han falls in love with Ya Nuo, while Zi Feng becomes her "sworn brother" and closest friend. As her 26th birthday approaches, Ya Nuo faces uncertainty about her long-awaited return to her true gender and the challenges that come with it. This is a 2015 Taiwanese drama series directed by Chen Rong Hui.

Bromance

The B-romantic Triad

KBS02

Joseon Dynasty woman Hong Ra On (Kim You Jung) has lived her entire life disguised as a man, earning a living as a relationship counselor and writing romance novels. However, a love letter she wrote for a client leads her to meet the mischievous Crown Prince Lee Yeong (Park Bo Gum), although he’s unaware of her true identity. While their first meeting goes poorly, a bizarre turn of events turns Ra On into a palace eunuch, where she crosses paths with the prince once again. As Ra On navigates the treacherous royal court, an unexpected bond forms between her and Yeong, but their growing affection is complicated by Ra On's secret, the strict social hierarchy, and the political power struggles threatening the throne.

Love in the Moonlight

The Moonlight Lovers

High school senior Jang Dan Bi (Kim Seul Gi) is dreading her college entrance exams – but on the day of the test, she literally splashes into a puddle and is transported to the Joseon Dynasty! There, she encounters King Lee Do (Yoon Du Jun), a young monarch struggling with mathematics, and a kingdom facing a severe drought. Mistaken for a eunuch, Dan Bi uses her modern-day knowledge to help the King, forming an unlikely bond. As their feelings for each other begin to grow, Dan Bi must decide whether to return to her own time, or stay in a past where she's found purpose and love.

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