Adapted from the online novel of the same name, it tells the story of a high school girl who dreams of becoming a veterinarian who meets the chairman of the Gamseong Group by chance and moves into a mansion as a part-time student, and begins a dramatic cohabitation life with the chairman's three grandsons with different personalities and a guard. In the play, Park So-dam plays Eun Ha-won, a high school student struggling to pay for college tuition, and will shine as the "red dot" in the mansion.