Myung-Jin Lee was born in Korea and graduated from Seoul Technical College with a degree in Visual Design. In 1992 he began work on his first manhwa series, It's Going to be a Wonderful Night, which ran for 4 years and won him the distinguished Champ Super Manhwa award from Korea's top manhwa publisher.

In 1995 he put his artistic career on hold to serve for two years in the Korean military. Upon his return, he formed his studio Dive to Dream Sea and began work on Ragnarok, one of the top-selling manhwa of all time, which he continues to work on to this day. Expanding upon his epic fantasy, Myung-Jin Lee has also become involved in the creation of Ragnarok Online, a game that takes the RPG analogies and rules of his manhwa series to the next level. With concepts taken from his own series, there are multiple players, worlds, and enemies to control, attack, and rule, with character designs and scenes somewhat reminiscent of Final Fantasy. The game is in its finished form and has been distributed in over 100 countries by Korean online game makers Gravity Corp.

In 2004 Ragnarok achieved a new milestone, becoming the first Korean manhwa to inspire a Japanese anime series. Based on the character designs and sensibilities of the online game, Ragnarok: The Animation aired on the TV Tokyo station.

Lee's studio, Dive to Dream Sea, also created the 2-volume indie comics comedy manhwa Laya, the Witch of Red Pooh