Secret Work From Home

In order for ordinary office worker Han Da-yeon to successfully arrange the project that will save her company, she becomes the secretary to her former classmate, Lee Ji-an, at his request. Now she has to work from home with the guy who ruined her first kiss back in high school! But, Da-yeon finds out that she was Ji-an's first love, and as Ji-an doesn't hide how he feels, the two get closer...

(Source: Naver Corporation, translated)