The drama is adapted from the popular webtoon of the same name, telling the story of Hyun Sung and Sung Ok, a couple who have been in love for 7 years and broke up due to a momentary mistake. It is a romance that resonates with the emotional reality of the coexistence of burnout and attachment.

Lee Dong-hae plays the role of the protagonist Zheng Hyun-sung (transliteration) in 《between him&her》, interpreting that although he has ambitions to create his own street fashion brand, he works hard while having an affair with his girlfriend Han Cheng-ok (transliteration) who has been in love for 7 years.The character who suffers from a breakup due to a momentary mistake is shown with realistic acting.

In particular, Lee Dong-hae resonated with the audience through his true youthful love story, such as the pain of long-term love between boredom and attachment, and the emotions that surge after separation.

Li Xue, who has a special temperament, has played the roles of - Bad Detective -, - When the Devil Calls Your Name -, - One Day - the heroine, and she is expected to play the role of - between him&her-The heroine "Han Sung-ok" is a jewelry designer who found a job in the general workplace after the brand she co-founded with her boyfriend Hyun-sung encountered operating difficulties. She was exhausted in order to make money.