•
Uhm Tae-woong as Jang Hee-tae - A
Marine biologist husband of Kim Il-ri. They initially met at he hospital where he was undergoing a circumcision operation, then he was briefly a substitute teacher at her school while waiting to go to the US to study. He first suspected his wife was having an affair by receiving a message from an anonymous number. After confirming the suspicion and throwing a fit, he filed a divorce petition and started living separately. Another problem arise in their family causing the two of them to stay together which made things difficult. But after realizing that he still loves his wife he decided to get back with Il-ri, however this time Il-ri refused because she doesn't think he will forgive her, and she was hurt when he initially wanted to divorce her. •
Lee Si-young as Kim Il-ri - A hard-laborer who only finished high school, Il-ri married her high school sub-professor Jang Hee-tae after they met again after 7 years. However, as soon as they got back from their honeymoon vacation, Hee-tae's sister collapsed which gave her the decision to not have children and treat Hee-soo as her baby as Hee-soo's body is paralyzed. When she accepted a
part-time work from her co-worker, she met carpenter Kim, whom she find herself attracted to. The two of them found mutual feelings but is later discovered by her husband causing a crack in their perfect marriage and filed a divorce. But after different trials in their family, she decided to leave carpenter Kim and got back together with Hee-tae. •
Lee Soo-hyuk as Kim Joon - Found by his grandfather at his doorstep, Kim Joon grew up following his grandfather's footsteps by becoming a carpenter. He hired someone to be the painter for his new studio and did not expect it to be a girl. At first being cold and grouchy with Il-ri and her chattering, he later fell in love with her even with the knowledge of Il-ri being married. •
Choi Yeo-jin as Jang Hee-soo - Hee-tae's sister who was once a ballerina but because of her collapsing and becoming a paralytic, she could only observe around her family, often imagining herself having conversations with her family in her head. • Lee Young-lan as Mrs. Go •
Im Ha-ryong as Jang Min-ho •
Park Jeong-min as Jang Ki-tae •
Seo Jeong-yeon as Kim Boon-ja •
Han Eu-ddeum as Kim Yi-ri •
Ryu Hye-rin as Jung Soo-young •
Han Do-woo as Choi Duk-bae • Han Soo-yeon as Yoo Sun-joo • Kim Ki-moo as Hwang Jung-goo •
Han Seung-yoon as Lee Suk • Kim Sung-ki as Mart Grandpa • Seo Tae-hwa as Professor Park • Hong Tae-ui as Park Min-ki •
Jin Hee-kyung as Kim Joon's mother • Park Jin-seo • Hwang Gun •
Gong Hyung-jin (
cameo) •
Lee Si-eon (
cameo) •
Sung Ji-ru (
cameo) ==International broadcast==