Main

• Shin Se-kyung as Yoon So-ah^[6]

A neuropsychiatrist with her own practice, who is currently struggling and swamped with debt. She is an only child with a tormented past, due to her belief that she was abandoned by her father as a teenager, resulting in her attempt to commit suicide by jumping into the Han River. Although she was saved from drowning, she ends up developing hydrophobia, especially for cold water. She meets Ha-baek upon his arrival to earth and, while helping him adjust to the human world and retrieve the sacred stones, falls in love with him. Unknowingly to them both, she is destined to be his bride.

• Nam Joo-hyuk as Ha-baek^[6]

The god of the Land of Water and the rightful heir to the throne of the Realm of the Gods. He comes to earth, specifically modern-day Seoul, with the aim of obtaining the sacred stones. At the request of the high priest and upon temporarily losing his powers, he seeks out So-ah's help as the last remaining descendant of the family destined to serve him. During their quest he finds himself falling for her but struggles with his feelings due to his impending return to the Water Kingdom. His love for So-ah is criticized by those from the Divine Realm since he's been in love previously with a human woman but their relationship ended tragically because of her betrayal.

• Lim Ju-hwan as Shin Hu-ye^[7]
  • Yoon Chan-young as young Hoo-ye.

A demi-god disguised as the CEO of a resort and Ha-baek's main rival. His birth parents are relatively unknown, apart from his mother being a human woman and his father a god from the Divine Realm. Because of his nature, he was abandoned as a child and is seen as a disgrace to the Realm of the Gods. His curse is subjection to an endless, mortal life on earth and deathly powers. Although they start off on the wrong foot, he eventually forms a friendship with So-ah and falls in love with her.

• Krystal Jung (credited as Jung Soo-jeong) as Mu-ra^[6] / Hye-ra

The goddess of the Land of Water who has lived among humans for hundreds of years as a well-known actress. She initially has an unrequited love for Ha-baek and despises So-ah because of their relationship, but eventually develops feelings for Bi-ryeom.

• Gong Myung as Bi-ryeom^[6] / Ahn-bin

The god of the Land of the Sky and a familiar face from So-ah's past. He hates Hu-ye unbeknownst to those from the Divine Realm, including Ha-baek and Mu-ra, because he was responsible for the murder of a close friend when he was a child. He initially has an unrequited love for Mu-ra, but it is reciprocated by her as the series progresses and they spend more time together.

Supporting

Extended

Special appearances

Development

First announced in 2015, the live action version of the manhwa was written by Jung Yoon-jung, writer of the dramas Arang and the Magistrate (2012), Monstar (2013) and Misaeng (2014). The series relocates the characters and story to modern-day Seoul.^[9] The first script reading took place on March 16, 2017 in Sangam-dong, Seoul, South Korea,^[10] with principal photography beginning the same month.^[2]

Original soundtrack

Part 1

Part 2

Part 3

Part 4

Part 5

Part 6