The cast of the upcoming highly anticipated drama “My Ahjusshi” has gathered for the first time to attend the script reading.

tvN has released its first script reading and released photos of the entire cast reading through the script.

IU, Lee Sun Gyun, Jang Ki Yong, Lee Ji Ah, Oh Dal Soo, Song Sae Byuk as well as Kim Young Min, Kwon Ah Yoon (Nara from Hello Venus), Shin Goo, Son Sook, Jeon Gook Hwan, Jung Hae Kyun, Jung Young Joo, Park Hae Joon, Oh Na Ra, An Seung Gyun attended the script reading.

Related: First Teaser Trailer Of IU And Lee Sun Gyun’s Upcoming Drama “My Ahjusshi” Released

The upcoming tvN drama will be directed by Kim Won Suk who has previously worked on “Misaeng” and “Signal.” The script will be written by Park Hae Young who has previously worked on “Another Oh Hae Young.”

The drama will tell the story of three brothers who struggle with their own lives separately, and a woman who is both cold and distant due to the many hardships she faced in her life, together they learn to enjoy and appreciate life and heal their past wounds.

Lee Sun Gyun will play Park Dong Hoon, the second oldest son of the three brothers, he’s an engineer in an architectural company, who always approaches everything in a safe matter. He is quiet but gives his all for the people he cares about.

IU will play Lee Ji An, the cold woman who’s suffered from many hardships in her life. As a part of her job she’s instructed by her boss to find Park Dong Hoon weakness. She ends up falling in love with his warm character, Lee Ji An learns how to trust someone for the first time.

Actress Lee Ji Ah will take on the role of Kang Yoon Hee, Park Dong Hoon’s wife (to be played by Lee Sun Gyun).

Oh Dal Soo will play Park Sang Hoon, he’s the eldest brother and a middle-aged man who is let go from his firm, he ran two businesses who ended up failing, this leads him to be chased out of his house. He moves in to his mother’s house, despite all the hardships he’s faced with, he continues to search for happiness.

Song Sae Byuk will play the role of the youngest brother, a genius director who directed an independent film that snagged him an invitation to Cannes Film Festival. Despite that great start, 20 years has passed and he’s still trying to successfully establish a career as a director.

“My Ahjusshi” will air its first episode on March 21 when “Mother” finishes its run.