Cheonsaeng Yeonbun

Self-proclaimed “happy single” Jiwoo is eager to inherit her grandfather’s business. But first, she's being forced to marry an employee at the company: a bachelor named Minwoo Kang! In a twist of fate, she suspects that he may actually be a boy from her childhood. Determined to uncover every little detail about her future husband, she'll disguise herself as a man and follow him to the new employee orientation. Everything seems to go according to her plan… But, wait! Are there really two different men named Minwoo?! A comical romance about a woman searching for the truth behind her partner!

(Source: TappyToon)