Many, many years ago in Korea, gods and goddesses ruled over the land, according to mythologies. Sungjae, the prince of the gods who was the god of masculinity and beauty, was born and raised in Mount Noklimsan, also known as the Green Forest Mountain, to King Seolyoon, the king of the gods and the god of energy, and Queen Jinhwa, the queen of the gods and the goddess of intelligence. Everyone on Noklimsan respected him, and all the goddesses had the hots for him because of his sweet charm and beauty.

One day, Sungjae's evil older brother, Iljae, the god of chaos, was planning to take the next heir for himself, so he cast a spell on Sungjae making him mortal, therefore exiling him from Noklimsan and turning him into an ordinary human being. It will not be easy for Sungjae to go back as he needs to prove himself a real man, but he is not sure how. To make matters worse, Iljae cast a spell on him, so that if he falls in love as a consequence of a kiss, he will die.

Soon, Sungjae ends up on the streets of modern-day Seoul, and tries to find a way to get back to the palace. However, his whole life changes he notices a young man named Hyunsik on the streets, and everything changes for him.