Yeonae Gyeongho Isang Mu!

Do Myeong (Soo) is caught breaking up with her lover by the precious young master Seol Hae-Jin (Gong), whom he has been protecting for a long time, and is subjected to strange, jealous harassment from Hae-Jin. "This is not right, I have the face to face the chairman and his wife.." (Source: Ridibooks, translated) Note: Chapter count includes prologue.