- Title: 썸데이 / Someday
- Genre: Romance
- Episodes: 16
- Broadcast period: 2006-Nov-11 to 2006-Dec-29
- Broadcast network: OCN
- Air time: Saturday & Sunday 22:00, Friday 23:00 (started on 2006-Nov-24)
- Original Soundtrack: Someday OST
Someday is about four different people's story about love.
Hana Yamaguchi (Bae Doo-Na) was a successful young cartoonist in Japan. Abandoned by her parents and brought up by her grandma, she was cold and aloof and did not believe in love which to her was only a simple biological response. When the elderly neighbourhood street sweeper died, she discovered the affection between him and her neighbour which lasted 60 years. Hana could not understand this kind of love, so she decided to trace her neighbour's footstep to Korea when she disappeared with her lover's ashes.
Go Jin Pyo (Kim Min Joon) was a doctor who was a comic book fan of Hana. He was overjoyed in meeting Hana and believed that he was in love for the first time in his life. He decided to help Hana in fulfilling her wish to look for her neighbour and enlisted the help of a private eye, Suk Man (Lee Jin Wook). Suk Man was the sole survivor of a car accident whereby his parents and brother were killed. He carried a lot of guilt towards the parents of the other victim and did his best to help out even at the expense of owing money to the loan sharks.
Hye Young (Oh Yoon Ah) was a PD of animation projects and a close friend of Jin Pyo. she didn't realize that she was in love with him till Hana appeared.
In bringing her neighbour's love story to fruition and published in print, the process changed the lives and outlook on love for these four people.
- Bae Doo Na as Hana Yamaguchi
- Kim Min Joon as Go Jin Pyo
- Lee Jin Wook as Im Suk Man
- Oh Yoon Ah as Jung Hye Young
- Choi family
- Yoon Won Suk as Choi Jae Deok (Seok Man's friend)
- Lee Eun as Choi Yoon Deok / Sammy (sister)
- Kim Mi Kyung as Ms Choi (mother)
- Kang Shin Il as Mr Choi (father)
- Other people
- Jung Young Sook as Hana's grandmother
- Ahn Yeo Jin as Sook Hyun (Hana's "Aunt")
- Kim So Ra (김소라) as Sachiko (Hana's friend, Sook Hyun's daughter, 22)
- Shin Goo as Oh Bong Soo (Hye Young's boss)
- Park Dong Bin as Hyung In (Dr Go's friend, doctor co-worker)
- Song Ji Young as Baek Eun Joo (Dr Go's nurse)
- Oh Jung Se as Seo Jung Joon (private loan collector)
- Ye Soo Jung as Gumiko-San (Hana's Japanese neighbor)
- Jun Sung Hwan as Jun Young Gil (street cleaner)
- Park Joo Hyung
- Lee Moo Saeng (이무생)
- Shin So Yool as Yoon Deok's friend