Oh! Youngsim

Young-sim's career is on the line. She gets one chance to keep it alive by taking on a pilot reality dating program. She uses all her power and connections to find the right guests. Miraculously, one of them is a high-profile CEO of a startup company, and he turns out to be the childhood friend who left her waiting on a park bench twenty years ago.

One of the female guests gets into an accident and can't make it to Young-sim's show, causing chaos. Without any other options, Young-sim steps up and takes her place. However, she still isn't sure if Wang Kyung-te is the Kyung-tae she once knew as she faces him.

Young-sim's pilot dating program becomes a hit. However, she becomes the laughing stock for getting zero points. While she tries to deal with her embarrassing image, a bombshell leak about the final outcome causes outrage and tarnishes Kingvely's reputation.

Kyung-tae pulls through and determines to restore Kingvely's image by agreeing to do another dating program with Young-sim. Young-sim might still have animosity toward Kyung-tae, but it's her only chance to save her career. However, an unexpected situation arises when she meets with Kyung-tae to share the program's proposal at his house.

Young-sim and Kyung-tae get caught in a pickle, almost naked. Chae-dong and Wol-sook sense something strange between them and vow never to leave them alone together. Meanwhile, the team meeting for Young-sim's new program with Kingvely goes nowhere, and Wol-sook suggests going on a work retreat.

Things get a little tipsy and revealing at the work retreat. But Kyung-tae shows his knowledge in dating and wins everyone's hearts. Out of Kyung-tae's chaos, Young-sim thinks of a brilliant idea for the dating program and calls it "Love, Mark." They pitch it to the director with high hopes.

The first episode of "Love, Mark" gets underway. However, the two cast members have a hard time making it happen and give the production crew a hard time. To solve the problem, Wol-sook uses jealousy to stir their emotions.

Kyung-tae and Chae-dong chase after Ki-ho, who took off with the footage and Young-sim. They catch up and save Young-sim and persuade Ki-ho to let his episode go on air. Young-sim returns the favour and finds someone else who would gladly meet Ki-ho on a blind date.

Min-ji and Woo-chan's episode begins filming, but Kyung-tae's personality gets in the way. As Young-sim and Kyung-tae try to make things work between Min-ji and Woo-chan, they can't help but realize the similarity to their brief childhood romance. Meanwhile, Woo-chan learns what happened in the past, and Young-sim goes on a date.

Young-sim and Kyung-tae fall deeply for each other. Despite their happy days as a couple, another incident occurs that tests their relationship again. Wol-sook schemes to make reporters write articles that say she and Kyung Tae are dating. Although Kyung-tae wants to get the facts straight, Young-sim sees this as an opportunity to promote her show.