Through the Waves

Through the Waves is a 2018 South Korea morning soap opera starring Ah Young, Park Jung-wook, Jay Kim, Jang Jae-ho, Seo Ha, Noh Haeng-ha, Kim Jung-heon, and Jung Yoon-hye. It aired on KBS2 from February 12, 2018 to August 31, 2018.
It is the 44th and the final TV Novel series of KBS. It is also the lowest-rated TV Novel series, averaging only 7.4% and hitting a peak of 10.4%, according to AGB Nielsen's nationwide ratings.

Plot

This is a family drama which tells the story of a family of five women who lost their property and became separated after the war.

Ah Young as Oh Bok-shil/Oh Se-ra, the only daughter in the Oh household who becomes a singer named Oh Se-ra in order to look for her missing father.
* Jo Ye-rin as young Oh Bok-shil
Park Jung-wook as Han Kyung-ho, Bok-shil's childhood friend and Daeguk Construction employee who realizes his feelings for her.
* Park Ha-joon as young Han Kyung-ho
Jay Kim as Cha Sang-pil, the chief executive officer of Lucky Entertainment and an orphan who becomes insecure of his position in the Hwang household that adopted him.
Jang Jae-ho as Oh Jung-hoon, the eldest of the Oh brood who shoulders the burden of being the man of the household and fails in his dreams of becoming a lawyer.
* Kwon Mi-reu as young Oh Jung-hoon
Seo Ha as Uhm Soon-young, Jung-hoon's girlfriend of four years whom he had to abandon to marry a rich woman.
Noh Haeng-ha as Hwang Mi-jin, the daughter of construction magnate Hwang Chang-shik whom Jung-hoon marries to get a better chance in life.
* Lee Yoo-joo as young Hwang Mi-jin
Kim Jung-heon as Oh Jung-tae, the second son of the Oh family who could not go to school and could only live a poor and violent life.
* Lee Hyun-bin as young Oh Jung-tae
Jung Yoon-hye as Kim Choon-ja, the Oh siblings' childhood friend and neighbor who insistently clings onto her longtime crush, Jung-tae.

Lee Kyung-jin as Lee Ok-boon, the mother of the Oh siblings who lost her husband during the war and was forced to make difficult decisions to survive.
Ban Hyo-jung as Hong Ki-jun, the grandmother of the Oh siblings who lives with the guilt of losing her son's riches during the war and plunging their family into poverty.
Lee Si-hoo as Oh Jung-woo, the youngest of the Oh siblings whose leg becomes lame in a childhood accident.
* Jung Hyeon-jun as young Oh Jung-woo

Kyun Oh-hyun as Han Cheon-sam, Kyung-ho's father who works as a musician for the Golden Carriage Cabaret.
Lee Kyung-sil as Yang Mal-soon, Kyung-ho's mother who is a seamstress and holds a tight leash on the household.
Jung Sung-ho as Kim Sang-man, Choon-ja's father who works for the government and helps the Oh family settle into the poor Seoul neighborhood of Sohyun-dong.

Sunwoo Jae-duk as Hwang Chang-sik, the Chairman of Daeguk Construction whose wealth was secretly built on the stolen riches of the Oh family.
Sung Hyun-ah as Cheon Geum-geum, Chang-shik's nosy and haughty wife.

Lee Joo-hyun as Cho Dong-chul, chief executive officer of Golden Carriage Cabaret who runs a gang of thugs and does dirty work for Hwang Chang-shik.
Park Seon-young as Gu Mi-shim, Soon-young's aunt who initially opposes her relationship with Jung-hoon.
Song Young-jae as Johnny Kim, Han Cheon-sam's musical partner who influences his gambling addiction.
Nam Tae-woo as Park Yong-chil, Dong-chul's lackey.

Kim Min-seon as Oh Hae-rin, the daughter of a rich ally of Hwang Chang-shik and Bok-shil's fellow singer trainee who has a crush on Kyung-ho.
Seo Jae-won as Heo Jin-gyu, Sang-pil's employee.

In this table, represent the lowest ratings and represent the highest ratings.
NR denotes that the drama did not rank in the top 20 daily programs on that date.