Oh Young Sim is single and in her 30’s. She has worked as a TV variety show PD for 8 years. She wants to make people laugh with her TV shows, but they were always cancelled due to low popularity ratings. Her career is now in a crisis. She has a chance to produce a love entertainment show as a pilot program. For the show, Oh Young Sim casts famous start-up founder Mark Wang as a guest. She is surprised that Mark Wang is Wang Kyung Tae. When they were little, Wang Kyung Tae had a crush on Oh Young Sim and he always let her know how he felt about her. Oh Young Sim did not feel the same way towards Wang Kyung Tae at the time. He then suddenly moved to the United States with his family. They lost with each other afterwards. Now, 20 years after they were last together, Wang Kyung Tae appears in front of her as CEO Mark Wang. Meanwhile, PD Lee Chae Dong works with PD Oh Young Sim in the same variety show department. He is always on her side. Also around Oh Young Sim is her friend Goo Wol Sook. She runs popular YouTube video channel “Ku’s Date.” Adapted from the animated series "Yeongsimi" (영심이), which in turn is based on the comic series "14-year-old Yeongsimi" (열네 살 영심이) by Bae Geum Teak (배금택).