Park Yun Jae, a university student studying astronomy, found love with Kim Ji Eun after their very first blind date. Their relationship was beautiful and warmhearted until one day, an unimaginable event occurred: Kim Ji Eun mysteriously woke up transformed into a man. Shocked but determined, she explains the unbelievable situation to Yun Jae, taking on the new identity of Kim Ji Hun.
Despite the drastic change, the couple makes a profound decision: they will not break up. Instead, Yun Jae bravely steps in to teach Ji Hun how to navigate life as a man, while together they embark on a desperate quest to discover a way to reverse her transformation and return her to her original female appearance. Their unique journey is further complicated by Kang Min Ju, a popular girl at their university who harbors a strong crush on Yun Jae, adding an unexpected challenge to their already extraordinary circumstances.
Other names: My Girlfriend Is a Hot Guy, My Girlfriend Is a Real Man, My Girlfriend Is a Tough Guy, My Girlfriend's a Real Man, Nae Yeojachinguneun Sangnamj