Work Hard. Sleep None.

Chaeyoung is a broke college student working two jobs.

Mina is a young successful billionaire and CEO of her company.

Chaeyoung seems to be at the end of the road with her draining life, so Dahyun decides to help her best friend in the only way she knows how, by introducing her to a whole new world.
.
.

(Fifty shades of grey-ish but different.)

(Dubchaeng and MiSaMo friendship with side dahmo and satzu. DaChaeTzu friendship later in the story.)