Uhm Tae Woong as Jang Hee Tae
Lee Si Young as Kim Il Ri
Lee Soo Hyuk as Kim Joon

Jang Hee Tae’s family

Lee Young Ran as Mrs. Go
Im Ha Ryong as Jang Min Ho
Choi Yeo Jin as Jang Hee Soo (Jang Hee Tae’s Sister)
Park Jung Min as Jang Ki Tae (Jang Hee Tae’s Brother)

People around Il Ri

Seo Jung Yun as Kim Boon Ja
Han Eu Ddeum as Kim Yi Ri
Ryu Hye Rin as Jung Soo Young
Han Jong Young as Choi Duk Bae

People around Hee Tae

Han Soo Yun as Yoo Seon Joo
Kim Ki Moo as Hwang Jung Goo
Yoon as Lee Suk
Kim Sung Ki as mart granpa
Suh Tae Hwa as Prof. Park
Hong Tae Ui as Park Min Ki
Lee Sun Goo as Hee Soo’s ex-boyfriend

Cameo

Gong Hyung Jin as doctor
Lee Shi Un as man of having crush on Il Ri