ASTRO's Sanha, Oh My Girl's Arin, Chuu, and Yoo Jung Hoo have been confirmed for the new drama 'My Girlfriend is a Tough Man', based on a popular webtoon series of the same name. 

The story revolves around a girl named Kim Ji Eun (played by Arin) who transforms into a handsome man one day due to a mysterious phenomenon that occurs in her family lineage. Ji Eun and her boyfriend, Park Yoon Jae (played by Sanha), have to put their heads together to figure out how this strange relationship can work. The role of male version Kim Ji Eun will be played by Yoo Jung Hoo, known for dramas like 'Bitch X Rich' and 'Durian's Affair'.

Meanwhile, a popular girl on campus named Kang Mi Joo (played by Chuu) shows an interest in Park Yoon Jae. 

Filming for the inventive new romantic comedy series kicks off in August. 

SEE ALSO: Five Korean dramas invited to the Cannes International Series Festival