He next starred in Couple or Trouble (2006), a Hong sisters-penned romantic comedy series inspired by Overboard about a handyman who gets his petty revenge on an amnesiac heiress by lying to her that she's his live-in girlfriend so that she'll help take care of his three nephews.

Oh Soo-jung (2007) as a pro-golfer who wants to get back at the ex-girlfriend who dumped him when he was overweight and unsuccessful, and Single Dad in Love (2008) as a mixed martial arts fighter whose young son has been diagnosed with a brain tumor; but these series drew lackluster ratings.

[5] In 2009, he played a smart yet socially inept underperformer whose wife will do anything to help him climb the corporate ladder in Queen of Housewives; despite being outshined by his other costars, Oh proved his willingness to look foolish in the service of comedy (similar to his turn in the 2005 series Super Rookie).

[6][7] Oh then reunited with Single Dad in Love television director Kwak Jung-hwan in his most high-profile, critically acclaimed series yet: historical drama The Slave Hunters (2010).

[9][10] In 2011, Oh was cast in a supporting role in Sector 7, a 3D action film about a creature lurking on an oil rig, then appeared in the Korea-China-Japan co-production Strangers 6 and medical drama The Third Hospital (both in 2012).

[19] A TV program later interviewed Lim's relatives and with their permission, entered her bedroom, and some of Oh's personal items were shown on camera, such as his screenplay and photos.