Yang Semi. The sole heiress of YG Entertainment. After losing the founder, Yang Hyunsuk, the head secretary, Song Jihyo, and the CEO in training, Yang Sejin, Yang family's last hope, Yang Semi is on verge. As the world's hottest sites are telling, Yang family had died on an airplane accident, except their youngest daughter, Semi/Sammy.

And here I am. YG's most successful group, Bigbang's famous leader, Gdragon. As the most trusted person in YG by sajangnim, I'm here to teach Semi how to be a CEO. But the problem is, Semi is a young 15 years old lady! How am I supposed to take care of, teach, and be the forster father of Semi, when I'm only 29 years old?!